1. ANSYS Release 8.1 New Feature Update
4/22/2004

2. New and Exiting Developments in:
ANSYS Release 8.1
New and Exiting Developments in:
Nonlinear Mechanics
Physics Coupling
Solver Performance
Meshing
CAD Integration
Optimization
4/22/2004

3. ANSYS Release 8.1
This presentation is organized into four primary parts highlighting new v8.1 features:
ANSYS Mechanical family of products.
ANSYS Multiphysics
ANSYS Workbench
ANSYS DesignXplorer
Parallel Performance
Mechanical
Multiphysics
Workbench
DesignXplorer
Parallel
4/22/2004

4. ANSYS Release 8.1 Mechanical Products
New Features Update
4/22/2004

5. Usability and Miscellaneous
Mechanical
Release 8.1: New Features
Nonlinear analysis
Contact Setup and Convergence
Element Technology and Transient Dynamics
Materials Technology and Curve Fitting
Linear analysis
CMS, Constant Material Damping and Linear Dynamics Enhancements
Usability and Miscellaneous
Usability and Other Enhancements
Undocumented Features
Solvers
PCG, DPCG
Sparse
Other solver enhancement
4/22/2004

6. Mechanical
Nonlinear Analysis
4/22/2004

7. Contact Setup and Convergence
Mechanical
Contact Setup and Convergence
Contact setup: Enhanced contact-pair management allows more efficient setup and execution of a contact analysis.
Benefits
You can run a partial solution of the model in its initial configuration and postprocess contact quantities (such as contact pressure, penetration, status, etc.) at time 0, before the actual solution. The new capability allows you to identify contact configurations that may be at risk for convergence difficulties.
You can reduce initial penetration or gap by physically moving contact nodes towards the target surface.
Commands
New options on the CNCHECK command
Nonlinear diagnostics: To debug models that experience convergence difficulties due to contact.
New command options allow you to track specific contact quantities during the solution (for example, result items such as contact penetration and chattering level, and some contact setting parameters such as contact stiffness and pinball radius). The contact data are computed on a per-contact-pair basis; that is, they represent a maximum or minimum value for the specified quantity over the entire contact pair.
NLHIST command
4/22/2004

8. Contact Technology Diagnostics
Mechanical
Contact Technology Diagnostics
View contact status before solving using CNCHECK,POST
4/22/2004

9. Contact Technology Diagnostics …
Mechanical
Contact Technology Diagnostics …
Setup Nonlinear Diagnostics Monitoring:
This step can be done either prior to running a solution or prior to executing a restart after a convergence failure.
Commands:
/SOL
NLDIAG,NRRE,1
NLDIAG,EFLG,1
4/22/2004

10. Contact Technology Diagnostics …
Mechanical
Contact Technology Diagnostics …
Results Variables: Track solution variables during SOLVE
4/22/2004

11. Contact Technology Diagnostics …
Mechanical
Contact Technology Diagnostics …
Run the Solution and while the solution is running, activate results tracker plots of the variables created.
These graphs should be updating as the solution progresses.
4/22/2004

12. Contact Technology Diagnostics …
Mechanical
Contact Technology Diagnostics …
Plot NR Residuals during convergence problems.
4/22/2004

13. Other Contact Enhancements …
Mechanical
Other Contact Enhancements …
An augmented Lagrange algorithm (when KEYOPT(2) = 0) improves convergence with very difficult models. Likewise, improved contact stiffness (which updates automatically per iteration when KEYOPT(10) = 2) allows improved convergence and more accurate solutions.
This release adds CEINTF logic for solid-solid assemblies using MPC contact, providing more accurate solutions. Improved overconstraint detection for MPC contact allows more complex MPC models to solve successfully.
Node-to-surface contact now fully supports all the same multi-physics DOFs that surface-to-surface contact supports.
Benefits
This offers users more contact options and, when applicable, the possibility of more efficient multi-physics runs.
4/22/2004

14. Multiphysics Contact Enhancements
Mechanical
Multiphysics Contact Enhancements
Consider the FEA simulation of a resistance spot weld process using the plane67 thermal-electric elements and contact.
Using conventional surface to surface contact, the model takes 65 iterations to converge.
Using node-to-surface contact, this same model converges in only 37 iterations.
Copper Electrodes
Steel Plates
Voltage Distribution
Temperature Distribution
4/22/2004

15. Element Technology Mechanical
In beam design, it is customary to employ components of stress that contribute to axial loads and bending in each direction separately. To that end, the BEAM188/BEAM189 elements now provide a linearized stress output as part of the SMISC output record.
4/22/2004

16. Element Technology … Mechanical
The MPC184 multipoint constraint element's Revolute Joint and Universal Joint options now allow nonlinear stiffness, damping, and hysteretic friction on the unrestricted components of relative motion of the joints.
MPC184 element with the Rigid option (KEYOPT(1) = 1) is now supported in modal and prestressed modal analyses using the Block Lanczos and QRDAMP eigensolvers (MODOPT,LANB and MODOPT,QRDAMP), and in modal harmonic and modal transient analyses (HROPT,MSUP and TRNOPT,MSUP).
4/22/2004

17. Transient Dynamics Mechanical
HHT Time-Integration: When performing a full transient structural analysis, you can now select the HHT time-integration method as an alternative to the default Newmark method.
Benefits:
The HHT method offers better numerical damping capability, providing controllable numerical damping in the higher frequency modes while maintaining accuracy in the important low frequency modes.
Commands:
To activate the HHT time-integration method, set TINTOPT = HHT on the TRNOPT command and input related integration parameters via the TINTP command. From within the ANSYS GUI, you can access these settings via the Solution Controls dialog box.
4/22/2004

18. Transient Dynamics … Mechanical
You can now issue a PRNSOL or PLNSOL command to list or plot, respectively, the nodal velocity and nodal acceleration in the /POST1 postprocessor as you would with a nodal displacement solution. You can also issue a PRVAR or PLVAR command to list or plot, respectively, the time history of velocity and acceleration for a specified node in the /POST26 postprocessor.
4/22/2004

19. Materials Technology Mechanical
Gasket Transverse Shear: Transverse shear stiffness can now be included as a material property for gasket elements (INTER192 -INTER194). By default, gasket elements account for through-thickness behavior only, but now you can enable the transverse shear stress option by setting KEYOPT(2) = 1.
Benefits
Use of this option helps to eliminate rigid body motion of the gasket. In previous releases this rigid body motion had to be restricted by restraining the DOF in the transverse direction.
Commands
You can define transverse shear stiffness via the gasket material command TB,GASKET with TBOPT = TSS. By default, stable stiffness is used if the transverse shear stiffness is not defined.
4/22/2004

20. Materials Technology …
Mechanical
Materials Technology …
As with gasket pressure, transverse shear stress is also available for post processing via conventional procedures.
By GUI method:
Or by commands method:
PLNSOL, GKS,XY
PLESOL, GKS,XY
Model Deflections
4/22/2004

21. Curve Fitting Enhancement
Mechanical
Curve Fitting Enhancement
The Curve Fitting Tool (TBFT) now allows selected coefficients to be fixed. This is very useful, especially for viscoelasticity and creep.
Benefits
Viscoelasticity: Solve for one temperature, fix all of the coefficients except for the shift coefficients and then solve for each new temperature. This simplifies the solution.
Creep: If the creep data is temperature independent, set the temperature coefficient to zero and fix it.
Hyperelasticity: First solve for a lower order model (e.g., 2nd order Ogden), then solve for a higher order model (e.g., 3rd order Ogden) after fixing the first few coefficients of the lower order model (e.g., the first 4 coefficients from the 2nd order Ogden model).
4/22/2004

22. Curve Fitting Enhancement …
Mechanical
Curve Fitting Enhancement …
Fix constants
Vary constants
4/22/2004

23. Mechanical
Linear Dynamics
4/22/2004

24. CMS Analysis Mechanical General Idea
Modal Representation: Describe the motion separately over each of the substructures (components).
Synthesis: Constrain the components to work together as a single structure by satisfying inter-component compatibility and equilibrium constraints.
Why use CMS ?
Flexibility: If only a part of a large assembly needs redesigned, such as the landing gear of an aircraft assembly, CMS provides the flexibility to just modify that Component, landing gear in this case, and do a CMS use pass run to get the response of the full assembly.
Better Preliminary Analyses: For example, car companies have CMS files for various car body parts such as roofs, doors panels, et al. Using CMS they are able to find out the response of a full model car configuration by selecting a door and a roof from different door and roof models that they already have CAE data for.
Optimize Designs: Different groups are free to design different parts allowing for optimized designs
4/22/2004

25. CMS Enhancement Mechanical
Free-interface method: ANSYS now supports the free-interface CMS analysis method. The new method allows unconstrained interface nodes and considers rigid body modes in the CMS superelement generation pass.
Benefits
While the fixed-interface method (ANSYS 8.0) is preferable in most CMS analyses, ANSYS recommends the free-interface method when your analysis requires more accurate eigenvalues computed at the mid- to high-end of the spectrum.
With the free-interface method, the matrix employed for CMS transformations is different than that for the fixed-interface method
Expand all eigen modes: You can now expand CMS superelement eigen modes modes 1 through N (that is, between a specified beginning and ending time or frequency range) in a single solve step, instead of expanding a single mode at each solve step.
Prestressed modal analysis with CMS superelements: The prestressed condition of a component structure can now be accounted for in the CMS superelement generation. Both fixed- and free-interface methods support the generation of prestressed CMS superelements.
4/22/2004

26. CMS Example Mechanical
PART1
INTERFACE1
INTERFACE3
INTERFACE2
PART2
PART3
The 2D tuning fork is already broken up into three element components as shown. Three nodal components also exist that will be used to define the SuperElement interfaces.
4/22/2004

27. Mechanical
CMS Generation Pass
4/22/2004

28. Mechanical
CMS Generation Pass …
4/22/2004

29. Can Include Pre-stress Effects
Mechanical
CMS Use Pass
Can Include Pre-stress Effects
4/22/2004

30. Mechanical
CMS Use Pass …
4/22/2004

31. Mechanical
CMS Expansion Pass
4/22/2004

32. Mechanical
CMS Post-Processing
4/22/2004

33. CMS Fixed Versus Free Method
Mechanical
CMS Fixed Versus Free Method
Table of modal frequency results
Accuracy of CMS free interface method compared to CMS fixed interface method.
0.000 4
13,691.1
10,277.0
9,227.01
6,216.89
5,117.47
3,427.08
3,023.30
2,118.13
1,326.91
Full Model
0.023
13,694.3 14
0.012
10,278.2 13
0.009
9,227.88 12
0.007
6,216.90
6,217.32 11
0.003
5,117.63 10
0.001
3,427.13 9
0.002
3,023.36 8
2,118.16 7 6 5
CMS – Free
CMS – Fixed
Error (%)
Frequencies (Hz)
Modes
4/22/2004

34. PSD Analysis and Constant Material Damping
Mechanical
PSD Analysis and Constant Material Damping
Equivalent Stress for PSD Analysis: The calculation of equivalent stress (SEQV) has been improved for random vibration (PSD) analyses using the Segalman-Reese algorithm. Principal stresses and stress intensity (S1, S2, S3, and SINT) are no longer available.
Support is now available for full (ANTYPE,HARM and HROPT,FULL) and modal harmonic (ANTYPE,HARM and HROPT,MSUP) analyses when several materials, each having their own damping ratio that remains constant with respect to the excitation frequency, are present. An enhanced MP command supports the new capability.
When constant damping ratios are specified (DMPRAT and MP,DMPR) in a frequency-response analysis, they are incorporated into the damping matrix automatically.
Only the QR damped eigensolver (MODOPT,QRDA) supports the material-dependent constant damping ratio application in modal superposition harmonic analyses.
Power Spectral Density (PSD) and Multi-Point Response Spectrum (MPRS) analyses do not support constant material damping for multiple materials
4/22/2004

35. Usability and Miscellaneous
Mechanical
Usability and Miscellaneous
4/22/2004

36. Post-Processing GUI Changes
Mechanical
Post-Processing GUI Changes
4/22/2004

37. Mechanical
Usability
Tabular loading: Tabular loads can now support loading as a function of X, Y or Z in a local coordinate system. The local coordinate system can be in the Cartesian, Cylindrical or Spherical coordinate system. When defining the table parameter, the coordinate system ID should also be specified (*DIM).
Macro and command file error handling: If a macro or /INPUT (File > Read Input From) of a command file is executed in the wrong module, repeated warnings occur.
(For example, warnings appear if you try to issue a PLNSOL command in /PREP7 because PLNSOL is not a valid command, abbreviation or macro in the preprecessor.)
Upon encountering five such warnings, a dialog now appears allowing you to stop and exit the macro or /INPUT mode cleanly. You can modify the new behavior via a new /NERR command option.
4/22/2004

38. Other Enhancements Mechanical Heat Transfer
PLANE55 -- A thickness option has been added for this element. This option is useful for applications (such as turbomachinery) where 2-D models need to be coupled with 3-D regions.
SOLID87 -- An option (KEYOPT(5) = 1) has been added to use a consistent surface convection load matrix. The new option provides a more accurate solution on surfaces with large thermal gradients.
4/22/2004

39. Undocumented Features
Mechanical
Undocumented Features
The following command is no longer documented and may be removed from ANSYS at a future date:
GCGEN -- This command was valid only with the CONTAC48 and CONTAC49 elements, which are also no longer documented as of this release
The following elements are no longer documented and may be removed from ANSYS at a future date:
CONTACxx -- Old inputs using the following contact elements will continue to work, but you should update them to use the newer element:
Undocumented Element
Replace With
CONTAC48
CONTA175
CONTAC49
CONTAC26
4/22/2004

40. Mechanical
Solvers
4/22/2004

41. Solver Enhancements Mechanical
DPCG and PCG solvers now support large deformation and strain (NLGEOM,ON command) when memory saving is activated (MSAVE,ON).
The Lanczos eigensolver now supports modal analysis for elements using u-P formulation options:
Constraint MPC184 element and the
180 series of new generation continuum elements which use u-P options.
The u-P formulation elements can now be used in analysis types which use eigensolutions as a basis. These include modal superposition harmonics, modal superposition transient, and PSD analyses.
Enhancements to memory and data handling, with the memory-saving option (MSAVE,ON) and PCG or DPCG solvers;
The line search option (LNSRCH,ON) has been enhanced to handle contact and plasticity problems more efficiently;
Resulting in overall savings of 10 percent in cumulative iterations for a run.
Line searching itself is also faster, particularly for models using elements with extra shapes or enhanced strain formulations.
4/22/2004

43. ANSYS Multiphysics (Including ANSYS Emag & FLOTRAN CFD)
V8.1 New Features
4/22/2004

44. Low Frequency Electromagnetics High Frequency Electromagnetics
Multiphysics
Multiphysics Topics
Low Frequency Electromagnetics
Electric Field Elements
Current loading for SOLID117
High Frequency Electromagnetics
Phased Array Antenna Analysis
Multi-field Solver
Speed & efficiency enhancements
FLOTRAN
Turbulence models
Conjugate Heat Transfer
4/22/2004

45. Low Frequency Electromagnetics
Multiphysics
Low Frequency Electromagnetics
V8.1 New Features
4/22/2004

46. New Electric Field Analysis Capabilities
Multiphysics
New Electric Field Analysis Capabilities
Analysis Requirement:
Many real world electric field applications use “lossy” (mildly conductive) dielectric materials and require a quasistatic electric analysis to simultaneously consider capacitive and conduction effects.
New Features to Meet Requirement:
Three new high-order electric elements, PLANE230, SOLID231, and SOLID232, are now available for a low frequency electric field analysis.
The elements are applicable to steady-state electric conduction, time-harmonic and transient quasistatic electric field analyses.
The electrostatic PLANE121, SOLID122 and SOLID123 elements have been enhanced to support a time-harmonic quasistatic analysis.
Capability:
You can now perform an electric field analysis that simultaneously takes into account the conduction and capacitive effects.
The new and enhanced elements also allow you to transfer the calculated electric current and conduction or dielectric heating as sources for subsequent magnetic and thermal analyses respectively.
4/22/2004

47. New Electric Field Analysis Applications
Multiphysics
New Electric Field Analysis Applications
General Applications:
Lossy capacitors
Microwave passive components (when full-wave analysis can be avoided)
Transient effects in semiconductor devices
High voltage insulators
Charge injection devices
Dielectric heating
Particle detection
Biotissue Medical Applications:
Detection of malignant tissue
Electric Impedance Tomography (EIT)
Electromyography (EMG) – test muscle response to nervous (electric) stimulation
Angiography – help locate and characterize atherosclerotic lesions
Ablation – RF heating of cardiac tissue to cure rhythm disturbances
4/22/2004

48. New 23X Electric Field Elements
Multiphysics
New 23X Electric Field Elements
PLANE230, SOLID231, SOLID232
High-order shape functions
Material properties:
resistivity - MP,RSVX (RSVY,RSVZ)
permittivity - MP,PERX (PERY,PERZ) – valid for transient and harmonic analyses
loss tangent - MP,LSST – valid for harmonic analysis only
Reaction solution:
electric current (AMPS)
Analyses:
static (steady-state current conduction analysis)
transient (quasistatic)
harmonic (quasistatic)
Load transfer
heat generation rate to a thermal analysis
electric current to a magnetic analysis
4/22/2004

49. 23X Elements – Input Summary
Multiphysics
23X Elements – Input Summary
Name
PLANE230
SOLID231
SOLID232
2-D 8-node
3-D 20-node
3-D 10-node
electric solid
Geometry
Product
MP,EM,PP,ED
DOF
electric scalar potential (VOLT)
Reaction
total (conduction + displacement) electric current (AMPS)
Material Properties
RSVX, RSVY, PERX, PERY, LSST
RSVZ, PERZ
KEYOPT(3)
0 - Plane
1-Axisymmetric
4/22/2004

50. Enhanced 12X Electrostatic Elements
Multiphysics
Enhanced 12X Electrostatic Elements
Enhancements in red italic text!
PLANE121, SOLID122, SOLID123
High-order shape functions
Material properties:
relative permittivity – MP,PERX (PERY,PERZ)
loss tangent - MP,LSST – valid for harmonic analysis only
resistivity - MP,RSVX (RSVY,RSVZ) – valid for harmonic analysis only
Reaction solution:
electric charge (CHRG)
Analyses:
static
harmonic (quasistatic)
Load transfer
electrostatic forces to a structural analysis
heat generation rate to a thermal analysis
total current to a magnetic analysis
4/22/2004

51. 12X Elements – Input Summary
Multiphysics
12X Elements – Input Summary
3-D 10-node
3-D 20-node
2-D 8-node
Name
electrostatic solid
SOLID123
SOLID122
PLANE121
0 – basic printout, 1 – basic solution at int. pts, 2 – nodal field printout
KEYOPT(5)
0 - CS parallel to global, 1 - CS based on the I-J side
KEYOPT(4)
0 - Plane
1-Axisymmetric
KEYOPT(3)
RSVZ, PERZ
RSVX, RSVY, PERX, PERY, LSST
Material Properties
electric charge current (CHRG)
Reaction
electric scalar potential (VOLT)
DOF
MP,EM,PP,ED
Product
Geometry
4/22/2004

52. 23X Elements – GUI Menu path: Multiphysics
PLANE230, SOLID231, SOLID232 added to Library of Element Types as Electric Conduction elements
Menu path:
Main Menu>Preprocessor>Element Type>Add/Edit/Delete
4/22/2004

53. 23X,12X Elements – ANTYPE GUI
Multiphysics
23X,12X Elements – ANTYPE GUI
PLANE230, SOLID231, SOLID232 support steady-state, harmonic, and transient analyses
PLANE121, SOLID122, SOLID123 support static and harmonic analyses
Menu Paths:
Main Menu>Preprocessor>Loads>Analysis Type>New Analysis
Main Menu>Solution>Analysis Type>New Analysis
4/22/2004

54. Electromagnetics Analysis Elements
Multiphysics
Electromagnetics Analysis Elements
Emag
Analysis Class
Product
Material Properties
Multiphysics
Dielectric
Electric conduction
Dielectric losses
Magnetic
Static or Steady-state Y
Plane121
Solid122
Solid123
(VOLT-CHRG)
Plane230,Solid231,Solid232
(VOLT-AMPS)
Thermo-electric elements
(VOLT-TEMP)
Solid5,Solid98,Solid96
(MAG-FLUX)
Plane13,Plane53,Solid97
Solid117
(AX,AY,AZ – CSGX,CSGY,CSGZ)
LF Emag
Harmonic
Transient
Harmonic analysis Plane121,Solid122,Solid123
Plane13,Plane53,Solid97,Solid117
(AX,AY,AZ – CSGX,CSGY,CSGZ VOLT – AMPS)
Transient & Harmonic analysis:
HF Emag
Modal N
HF118, HF119, HF120
(AX – CSGX)
4/22/2004

55. Example steady state electric field analysis
Multiphysics
Example steady state electric field analysis
A current I is applied at two point electrodes (e) on a thin conducting disk as shown in the figure:
Problem parameters:
disk radius 20 cm
point electrode separation 20 cm
current I=1 mA
disk resistivity =100 *m
Analysis requirement: Find the potential and dc-current distributions in the disk
FEA Model:
Triangular PLANE230 electric elements
23,789 nodes, elements I e
4/22/2004

56. Steady-State Electric Analysis - Results
Multiphysics
Steady-State Electric Analysis - Results
Electric potential (VOLT) distribution
Electric current density (JC) distribution
4/22/2004

57. Example Transient Electric Field Analysis
Multiphysics
Example Transient Electric Field Analysis
Problem Description:
A capacitor has 2 separate layers of lossy dielectric materials between its plates.
Dielectric material 1: 1cm thick, εr = 2, ρ= 2E8
Dielectric material 2: 2 cm thick, εr =4, ρ= 8E8
A 1V potential is applied across the electrodes over a 1ms period of time
FEA Model:
2D triangular mesh of PLANE230 electric field elements.
Electrodes are left and right hand boundaries of mesh
Analysis Objective:
Determine time-varying results for:
Voltage (VOLT)
Conduction current density (JC)
Electric field strength (EF)
5 cm
1 cm
2 cm
4/22/2004

58. Transient Electric Field Analysis Results
Multiphysics
Transient Electric Field Analysis Results
Time varying contours of voltage
Time varying vectors of electric field strength EF
Note: As the charge accumulates on material interface, the voltage gradient across more conductive material on left diminishes.
4/22/2004

59. Transient Electric Field Analysis Results
Multiphysics
Transient Electric Field Analysis Results
Comparison of analytical and ANSYS computed results:
4/22/2004

60. New SOURC36 Capability Multiphysics Analysis Requirement:
Prior to release 8.1, SOURC36 “meshless” current source primitives could only be used in combination with magnetic scalar potential (MSP) elements (SOLID5, SOLID96, SOLID98).
Enhancement:
SOURC36 may now serve as a current source for the 3D edge flux potential elements (SOLID117)
This capability applies to 3-D static analyses only.
Benefit:
Easy to use, more efficient coil analysis when using SOLID117 elements.
The underlying region can be meshed separately from the coils, and the coils described conveniently with SOURC36 primitives. Solenoidal conditions are automatically satisfied.
The current can be input to SOLID117 elements via the CUR real constant on SOURC36, much easier than the alternative method involving manually defining body loads on each element.
4/22/2004

61. SOURC36 Analysis Example
Multiphysics
SOURC36 Analysis Example
Quarter symmetry model of solenoid using source36 for coil:
yoke
SOURC36 coil primitive
Space in which coil resides
armature
4/22/2004

62. SOURC36 Analysis Example
Multiphysics
SOURC36 Analysis Example
Quarter symmetry model of solenoid magnetic flux density (vectors) results using source36 for coil:
4/22/2004

63. High Frequency Electromagnetics
Multiphysics
High Frequency Electromagnetics
V8.1 New Features
4/22/2004

64. New Phased Array Capability
Multiphysics
New Phased Array Capability
Analysis Requirement:
Many real world HF antenna’s consist of geometric arrays of smaller identical antenna’s with different transmit phases. This approach improves antenna sensitivity, and also allows dynamic control over the antenna directional properties.
New Features to Meet Requirement:
High-frequency electromagnetic elements (HF119, HF120) support periodic boundary conditions
Uses Floquet’s periodic principle to allow phased array antenna analyses.
Uses far field extension to compute radiation pattern and directive gain of array.
Benefit:
Drastic reduction in problem size and resulting increase in solution speed.
Ability to solve class of antenna radiation problems previously beyond our scope!
4/22/2004

65. Phased Array Analysis Example
Multiphysics
Phased Array Analysis Example
Antenna consisting of 25 X 25 array and single cell modeled
4/22/2004

66. Antenna directive gain for single cell & full 25 X 25 array
Multiphysics
Phased Array Results
Antenna directive gain for single cell & full 25 X 25 array
4/22/2004

67. Animation of Y component of electric field for single array cell
Multiphysics
Phased Array Results
Animation of Y component of electric field for single array cell
4/22/2004

68. Multiphysics
Multi-field Solver
V8.1 New Features
4/22/2004

69. Multi-field Solver Enhancements
Multiphysics
Multi-field Solver Enhancements
Enhanced Feature:
The following enhancements have been made to the dissimilar mesh mapping aspects of the Multi-field solver:
Mapping information can be saved to a file for a later restart so that costly mapping calculations do not have to be repeated, especially for volumetric load transfer.
The mapping calculation can occur before issuing the SOLVE command (i.e. in /PREP7 or /SOLU).
Mapping diagnostics are improved for curved geometry.
The bucket search algorithm is more robust than the global search algorithm, and is now the default algorithm for mapping.
Benefits:
Overall increase in solution speed and efficiency of the Multi-field solver.
Solution speed gains of up to 17% have been measured on three field problems.
Largest gains can be expected for applications coupling more fields with greater differences between each field’s meshes, such as Fluid-solid interaction and RF-thermal heating.
4/22/2004

70. FLOTRAN Turbulence Models & Conjugate Heat Transfer
Multiphysics
FLOTRAN Turbulence Models & Conjugate Heat Transfer
V8.1 New Features
4/22/2004

71. FLOTRAN Heat Transfer Enhancements
Multiphysics
FLOTRAN Heat Transfer Enhancements
New Features:
Two new turbulence models have been added to FLOTRAN
k-ω Model
Shear Stress Transport (SST) Model
Applicable to FLUID141 and FLUID142 Elements:
Benefits:
FLOTRAN now has improved solution accuracy for heat transfer under turbulent conditions:
When the turbulence boundary layer is not well-resolved, a thermal stabilization procedure can be invoked to alleviate temperature-oscillations near walls.
When the turbulent boundary layer is well-resolved, new k-ω and SST turbulence models can be invoked to predict turbulent heat transfer in the presence of adverse pressure gradients.
The SST model combines the advantages of both the k-ε model and the k-ω models. Using a blending function, the SST model activates the k- ω model near walls and the k-e model far away from the walls.
4/22/2004

72. FLOTRAN Heat Transfer Example
Multiphysics
FLOTRAN Heat Transfer Example
Conjugate Heat Transfer problem involving turbulent flow through a 90 degree bend. Fluid tetrahedral mesh shown below:
Inlet Velocity 0.5 m/sec
Inlet Temperature 333K
Outlet Condition
P = 0
4/22/2004

73. FLOTRAN Heat Transfer – Example
Multiphysics
FLOTRAN Heat Transfer – Example
Fluid temperature results or SST turbulence model.
4/22/2004

74. FLOTRAN SST Model versus K-Epsilon
Multiphysics
FLOTRAN SST Model versus K-Epsilon
Detail of recirculation zone, Fluid velocity vectors.
SST model accurately predicts secondary recirculation zone.
K-Epsilon does not.
SST Turbulence Model
K-Epsilon Turbulence Model
4/22/2004

75. FLOTRAN SST Model versus K-Epsilon
Multiphysics
FLOTRAN SST Model versus K-Epsilon
Detail of recirculation zone, Fluid temperature.
SST model MATCHES experimental results in secondary recirculation zone.
K-Epsilon does not.  
SST Turbulence Model
K-Epsilon Turbulence Model
4/22/2004

77. Workbench
ANSYS Workbench
V8.1 New Features
4/22/2004

78. ANSYS Workbench V8.1 New Features
Workbench Start-up
ANSYS Workbench
V8.1 New Features
4/22/2004

79. Direct Access to Workbench Windows
Workbench Start Page
Improved Ease of Use
Direct Access to Workbench Windows
Project Page Available for Managing Files
Geometry Accessed from Simulation Window
Active CAD Systems
Files
4/22/2004

80. Workbench Options Menu
Global Workbench Options Control
Common Settings for All Applications
Unique Preferences That are Application Specific
4/22/2004

81. Workbench Options Menu
Mouse View Control Settings
Set Same as CAD Systems
Unique Preferences
View Operations Supported
Rotate
Pan
Zoom
Box Zoom
4/22/2004

82. New communication method that does not involve SPAM.
Workbench
Communication
New communication method that does not involve SPAM.
Can Provide Support Updates for:
Service Packs
Training
Tips & Tricks
FAQ’s
RSS News Headlines
ANSYS Corporate
Local Support News
4/22/2004

83. ANSYS Workbench V8.1 New Features
Non-Linear Materials
ANSYS Workbench
V8.1 New Features
4/22/2004

84. Bilinear Stress-Strain Bilinear Isotropic Hardening Model Specify:
Workbench
Nonlinear Materials
Bilinear Stress-Strain
Bilinear Isotropic Hardening Model
Specify:
Yield Stress
Tangent Modulus
4/22/2004

85. Multilinear Stress-Strain Multilinear Isotropic Hardening Model
Workbench
Nonlinear Materials
Multilinear Stress-Strain
Multilinear Isotropic Hardening Model
Specify:
Tabular entry of stress-strain data.
4/22/2004

86. Solution Feedback and Results
Workbench
Solution Feedback and Results
ANSYS Workbench
V8.1 New Features
4/22/2004

87. Solution Output Object Force Max DOF Increment Line Search Value
Workbench
Convergence History
Solution Output Object
Force
Max DOF Increment
Line Search Value
Time Increment
4/22/2004

88. Provides displacement or contact result plots.
Workbench
Result Tracker
Provides displacement or contact result plots.
Return Newton-Raphson residual forces
Helps in determining the cause of convergence failures in nonlinear analyses.
4/22/2004

89. Directional Deformations (x, y, z) Contact
Workbench
Result Tracker Types
Directional Deformations (x, y, z)
Contact
Number Contacting
Number Sticking
Pressure
Penetration
Gap
Frictional Stress
Sliding Distance
Chattering
Elastic Slip
Normal Stiffness
Max Tangential Stiffness
Min Tangential Stiffness
Resulting Pinball
4/22/2004

90. A Contact Tool object can be added to a Solution folder
Workbench
Contact Result Tool
A Contact Tool object can be added to a Solution folder
Allows users to conveniently scope contact results to a common selection of geometry or contact regions.
4/22/2004

91. Contact Tool - Reactions
Workbench
Contact Tool - Reactions
Reactions for all contact pairs are summarized in the worksheet view.
4/22/2004

92. Workbench
Command Objects
Users familiar with ANSYS commands and APDL programming can now enter commands directly Commands objects.
After inserting a Commands object at the Environment or Solution level, the Worksheet tab transforms to a text editing window for entering the commands.
4/22/2004

93. Multiple instances are allowed
Workbench
Command Objects
Multiple instances are allowed
Command objects can be exported or inserted
Parametric output back to WB
4/22/2004

94. ANSYS Workbench V8.1 New Features
Meshing
ANSYS Workbench
V8.1 New Features
4/22/2004

95. Mesh Refinement Control
Workbench
Mesh Refinement Control
Sphere of Influence
Applied to a face
Anchored to a user defined coordinate system
Sphere of Influence
Applied to a vertex
4/22/2004

96. Tri / Surface Meshing Algorithms
Workbench
Tri / Surface Meshing Algorithms
Better Transitions in 3D Advancing Front
Improved Point Placement for Delaunay
4/22/2004

97. Automatic Contact Sizing
Workbench
Automatic Contact Sizing
With Contact Sizing
No Contact Sizing
4/22/2004

98. Automatic Contact Sizing
Workbench
Automatic Contact Sizing
4/22/2004

99. Drag’n’Drop contact regions from “Contact Folder” to “Mesh Folder”
Workbench
Contact Size Mesh
Drag’n’Drop contact regions from “Contact Folder” to “Mesh Folder”
Absolute (default) or Relative Sizing Options
4/22/2004

100. Performs Edge proximity pre-refinement for non-swept models
Workbench
Proximity Control
Performs Edge proximity pre-refinement for non-swept models
May increase model size
With Proximity
Without Proximity
4/22/2004

101. ANSYS Workbench V8.1 New Features
CAD Integration
ANSYS Workbench
V8.1 New Features
4/22/2004

102. Pro/ENGINEER Wildfire Autodesk Inventor 8
Workbench
CAD System Updates
Catia V5 R12
UG NX2
Pro/ENGINEER Wildfire
Autodesk Inventor 8
Autodesk Mechanical Desktop 2004 DX
SolidWorks 2004
Solid Edge 15
Parasolid 15.1
ACIS R12
4/22/2004

103. Attach and Update a model that is open in ProEngineer from Intralink
Workbench
CAD Integration
Smart Updates
Speed up the assembly update by updating only components that have been modified
Implemented for Unigraphics and Autodesk Inventor
A user preference to turn on Smart Update is available in Start Page under Advanced Geometry Preferences and the Geometry node details view
Attach and Update a model that is open in ProEngineer from Intralink
4/22/2004

104. ANSYS Workbench V8.1 New Features
Remote Solutions
ANSYS Workbench
V8.1 New Features
4/22/2004

105. Overview - Remote Solving
Workbench
Overview - Remote Solving
Can be used on the client machine
Allows work in other branches while solving locally
Can use LSF to solve remotely
Servers
LSF
Localhost
CE (Beta) – will allow remote solving without LSF
Submission
WB shutdown or switch allowed
Retrieval of queued jobs later in time
Numerous GUI changes for Preview 3
4/22/2004

106. Can solve on local machine, LSF cluster or UNIX server
Workbench
Remote Solving
Can solve on local machine, LSF cluster or UNIX server
Each Solution can be sent to a different server
Analysis license can be selected
4/22/2004

107. Each remote option has defaults in the Options dialog
Workbench
Remote Solving
Each remote option has defaults in the Options dialog
4/22/2004

108. The status page shows all submitted jobs
Workbench
Remote Solving
The status page shows all submitted jobs
4/22/2004

109. Miscellaneous Simulation Features
Workbench
Miscellaneous Simulation Features
ANSYS Workbench
V8.1 New Features
4/22/2004

110. Pretension Application Types:
Workbench
Pretension Bolt Loads
Pretension Application Types:
Load (force)
Adjustment (length, number of threads)
Introduced at v8.0 as a Mechanical feature.
Now Enabled by DesignSpace
Load
Adjustment
4/22/2004

111. Miscellaneous Enhancements
Workbench
Miscellaneous Enhancements
Right Mouse Button rename contact, results, etc.
Users can change the default name of a contact region to match corresponding descriptive names for items in the Geometry branch of the tree that make up the contact region.
Clicking the right mouse button on a contact region and choosing Rename Based on Geometry in the context menu changes the name of that contact region.
Clicking the right mouse button on the Contact branch and choosing the same option changes the names of all contact regions under the branch.
Configurable contact worksheet
When viewing a worksheet of a Contact folder or a Contact Reactions item, users now have the ability to select which columns to display in the worksheet table.
The choice is made in a context menu through a right mouse button click inside the worksheet table.
4/22/2004

112. Miscellaneous Enhancements
Workbench
Miscellaneous Enhancements
Right Mouse Button flip contact target and contact
For asymmetric contact, a useful enhancement at this release is the ability to flip contact and target faces or edges in a contact region.
This feature is available through a right mouse click on the contact region and choice of the Flip Contact/Target context menu item.
All contact and target items displayed under Scope in the Details View are reversed.
Point mass
Users can apply a Point Mass to the model from the Geometry object.
The location of a point mass can be anywhere in space and it can be defined in a local coordinate system.
4/22/2004

113. Miscellaneous Enhancements
Workbench
Miscellaneous Enhancements
Loads in local coordinate system
Forces, remote forces, bearing loads, moments and given displacements can now be defined in a local coordinate system.
With this capability, users no longer need to transform the loads and given displacements into the global coordinate system manually.
When any of these loads or given displacements are defined by components in the Details View, a new drop down menu is available from which users select a specific coordinate system to be applied.
Contact results in solution combinations
A Contact Tool object can now be added to a Solution or Solution Combination folder that allows users to conveniently scope contact results to a common selection of geometry or contact regions.
Using a Contact Tool, all possible contact results can be investigated at one time for a given scoping.
4/22/2004

114. Geometry - DesignModeler
Workbench
Geometry - DesignModeler
ANSYS Workbench
V8.1 New Features
4/22/2004

115. DM - Multiple Treeview Selection
Workbench
DM - Multiple Treeview Selection
You can now select multiple items in the feature tree. This allows you to perform operations on several items at once. For example:
Suppress, unsuppress, and delete multiple features at once
Hide and suppress multiple bodies at once
4/22/2004

116. Cross Section Improvements
Workbench
Cross Section Improvements
Several new options make aligning and assigning cross sections easier and more flexible.
Automatic alignment in global +Y direction
For unaligned edges, DM aligns the edge in the global +Y direction if the default global +Z direction is invalid
Additional angle option
Rotate property rotates the alignment vector around the edge by the specified angle
4/22/2004

117. Cross Section Improvements (cont)
Workbench
Cross Section Improvements (cont)
Edge reversal
The Reverse Orientation property allows you to define the edge alignment with respect to the opposite endpoint
Direction Arrow
New direction arrow shows alignment direction when specifying the cross section alignment
4/22/2004

118. Cross Section Improvements (cont)
Workbench
Cross Section Improvements (cont)
Improved Display Options
The cross section alignment arrows and solid representation can now be shown together
4/22/2004

119. Cross Section Improvements (cont)
Workbench
Cross Section Improvements (cont)
Easier Cross Section Assignment
The cross sections are now assigned to line bodies through a combo box property
Vector Alignment for Cross Sections
Cross section alignment may also be specified by entering vector coordinates
4/22/2004

120. Automatic Dimension Moving
Workbench
Automatic Dimension Moving
Now, dimensions will move with the edges they measure.
In the following picture, if dimension V2 is increased, then dimension H1 will automatically move up with the top edge of the rectangle.
Automatic movement can be turned on or off from the dimension’s Details Box.
4/22/2004

121. Workbench
Surface Extension
The Surface Extension feature extends surfaces to fill gaps in between bodies.
Surfaces can be extended by a fixed distance or up to a bounding set of faces.
4/22/2004

122. Useful for CFD and Emag applications.
Workbench
Fill Feature
The Fill feature will create a new frozen body to fill the space occupied by a hole or cavity.
Useful for CFD and Emag applications.
4/22/2004

123. Surfaces From Sketches Feature
Workbench
Surfaces From Sketches Feature
Surfaces From Sketches allows you to quickly and easily create surfaces directly from sketch profiles.
4/22/2004

124. New Import options allow greater control over imported geometry.
Workbench
Import Options
New Import options allow greater control over imported geometry.
The Process property allows body filtering, while geometry healing options help clean up poor geometry.
4/22/2004

125. Planar bodies are flat surface bodies that lie in the XYPlane.
Workbench
Planar Bodies
Planar bodies are flat surface bodies that lie in the XYPlane.
They can be sent to the Simulation tab for 2D analysis.
Planar bodies have a slightly different icon than other surface bodies in the Tree View’s body list.
4/22/2004

126. More Modeling Improvements
Workbench
More Modeling Improvements
Body Operation: Keep Option
You can choose to keep the selected bodies that are used in a Boolean operation
Multiple Surface Support for Joint
Any number of surfaces can be selected to join in a single Joint feature
Point Profiles for Skin/Loft
The Skin/Loft feature now accepts point profiles as the start and/or end profile.
Point Feature by Coordinates
Points can be created from scratch by reading in coordinates from a data file.
4/22/2004

127. More Modeling Improvements
Workbench
More Modeling Improvements
Arc Center Alignment for Plane Feature Now you can choose to position the plane origin at the center of an arc on the boundary of the base face
No Save Required for Parameter Manager You no longer need to save the model in order to begin using the parameter manager
Plane origin is placed at the center of this arc
4/22/2004

128. ANSYS Workbench V8.1 New Features
Beta Features
ANSYS Workbench
V8.1 New Features
4/22/2004

129. First surface picked is master or HiSector
Workbench
Mesh Matching (Beta)
Works for tet meshes only – not needed for sweeping. No support for Hex Dominant
First surface picked is master or HiSector
Need a coordinate system to define sector
Topology must match exactly
4/22/2004

130. Workbench
Mesh Matching (Beta)
4/22/2004

131. Workbench
Plane Stress (Beta)
4/22/2004

132. Workbench
Axisymmetric (Beta)
4/22/2004

133. Beam Stress (Beta) Direct Min Bending Max Bending Min Combined
Workbench
Beam Stress (Beta)
Direct
Min Bending
Max Bending
Min Combined
Max Combined
4/22/2004

134. Low Frequency Electromagnetics Simulation Beta Features
Workbench
Low Frequency Electromagnetics Simulation Beta Features
ANSYS Workbench
V8.1 New Features
4/22/2004

135. Objectives - WB LF Emag Objectives:
Workbench
Objectives - WB LF Emag
Objectives:
Provide full featured low frequency electromagnetics analysis capability in WorkBench.
Accessed with ANSYS Emag (core or enabled task) or ANSYS Multiphysics license key.
DM Enclosure for creation of “field” volume released at 8.0
Magnetostatics beta release ANSYS 8.1
Magnetostatics commercial release target ANSYS 9.0
Electrostatics and other LF electromagnetics capabilities will follow.
4/22/2004

136. WB LF Emag 8.1 Beta Features
Workbench
WB LF Emag 8.1 Beta Features
Model setup with SOLID117
Air, iron (Keyopt(1)=0)
Solid conductor (Solenoidal formulation: Keyopt(1)=5)
Enclosure body automatically assigned AIR material
Emag unit conversions
Conductor Object with Voltage and Current Loading
Flux-parallel boundary condition
Materials:
Relative permittivity, resistivity
Results request:
B, H, F
Solution: Will solve a linear magnetostatics problem
Raster/Vector display option in Details View.
4/22/2004

137. WB LF Emag: Material Properties
Workbench
WB LF Emag: Material Properties
Click mouse for zoom
4/22/2004

138. LF Emag Environment: Conductor
Workbench
LF Emag Environment: Conductor
Conductor object: Identifies conductors
for load application, inductance, and
postprocessing. Supports solid conductors
now for loads. Will support stranded
conductors as well at 9.0.
Loading: Tagged to Conductor. Supports
voltage and current loading for solid
conductor. Will support current loading
for stranded conductors
Click mouse for detail
4/22/2004

139. LF Emag Solution: Displayed Results
Workbench
LF Emag Solution: Displayed Results
4/22/2004

140. LF Emag: Vector & Contour Plots
Workbench
LF Emag: Vector & Contour Plots
Vector / Contour is selected in the Solution objects “Definition”
4/22/2004

141. Release 8.0 Beta features, plus: Support stranded coils (SOURC36)
Workbench
WB LF Emag 9.0 Features
Release 8.0 Beta features, plus:
Support stranded coils (SOURC36)
Support permanent magnets
Winding editor for machines (via SOURC36)
BH curve library
Automated electromagnetic Force & Torque extraction tools.
Automated Inductance tool
Parameter sweep
displacement vs. force, torque or inductance
4/22/2004

143. Optimization - DesignXplorer
ANSYS Workbench
V8.1 New Features
4/22/2004

144. DesignXplorer VT 8.1 Update
Topology Errors
Independent Soluton Type
Bonded MPC Contact Analysis in DesignXplorer VT
Revised User Interface
Design For Six Sigma
Questions and Answers
4/22/2004

145. DesignXplorer VT 8.1 Update
Topology Errors -- Topology Errors shows the topology changes that have caused DX VT to cut parameter ranges or fail to generate a solution
4/22/2004

146. DesignXplorer VT 8.1 Update
Independent Soluton Type -- Workbench now supports the Independent Solution Type which evaluates the derivatives assuming that the input variables are independent. This option is recommended when you have more than 7 geometric parameters.
4/22/2004

147. DesignXplorer VT 8.1 Update
Bonded MPC Contact Analysis in DX VT -- DesignXplorer VT now supports bonded MPC contact analysis for Surface-to-Surface Contact*
* - ANSYS 8.1 Service Pack #1
4/22/2004

148. DesignXplorer VT 8.1 Update
Revised User Interface -- DesignXplorer features a re-design of the user interface, intended to simplify and streamline the process of creating and accessing data.
View Selector
View Sub Options
View Details
4/22/2004

149. DesignXplorer VT 8.1 Update
Design for Six Sigma Analysis -- Design for Six Sigma is a technique that determines the extent to which uncertainties with respect to input parameters affect the finite element analysis results
4/22/2004

150. DesignXplorer VT 8.1 Update
Design for Six Sigma Analysis – Input Distributions
4/22/2004

151. DesignXplorer VT 8.1 Update
Design for Six Sigma Analysis – Output; Histograms, Probability Tables
4/22/2004

152. DesignXplorer VT 8.1 Update
Design for Six Sigma Analysis – Output; CDF, Probability Tables
4/22/2004

153. Parallel Performance for ANSYS
ANSYS Incorporated
© 2004 ANSYS, Inc.
ANSYS, Inc. Proprietary

154. Parallel Performance for ANSYS
Where is PPFA of the most benefit?
Any existing ANSYS customer with:
Processing large linear models faster 
Processing models that would not fit into the available hardware. (On four 32-bit machines, you can solve over 6 MDOF!)
Processing long running nonlinear analyses that can be solved by the PCG solver* 
Processing jobs as fast as possible.  Here the need is just shear throughput. 
* Sparse is under development for 9.0
4/22/2004

155. Parallel Performance for ANSYS
Where is PPFA of the most benefit?
Any existing customer interested in:
Quicker turnaround time
(Factors up to 6.5x for 8 machines)
4/22/2004

156. Parallel Performance for ANSYS
The Distributed Solution for ANSYS:
Parallel Performance for ANSYS
Add-on Module containing 4 solvers
Distributed Preconditioned Conjugate Gradient (DPCG)
New at 8.0!!!!
Distributed Jacobi Conjugate Gradient (DJCG)
Distributed Domain Solver (DDS)
Algebraic Multi-Grid Solver (AMG)
Works with a variety operating systems*
Intel IA-32 Linux
Intel IA-64 Linux
Intel IA-32 Windows
Intel IA-64 Windows
Wide variety of Unix: HP, IBM, SGI, Sun
* - Only homogenous clusters allowed
4/22/2004

157. Parallel Performance for ANSYS
Memory Management at 8.1
More efficient memory management in general
Distributed PCG (DPCG) solver now supports the memory saving feature (MSAVE command) which uses an element-by-element approach for the stiffness matrix
For elements Solid92, Solid95, Solid186 or Solid187
4/22/2004

158. Parallel Performance for ANSYS
Memory Management at 8.1
How much memory is required?
Machine #1 must contain its workload and the entire preconditioner
Machines #2 through N only need their individual workload
4/22/2004

159. Parallel Performance for ANSYS
How much memory is required?
For the Machine #1:
For Machines #2 through N:
Where: C = 1.0 for MSAVE,Off
= 0.7 for Solid95 or Solid186 with MSAVE, ON
= 0.5 for Solid92 or Solid187 with MSAVE, ON
Machine(1) Memory(Gb)
MDOF(Maximum) =
(0.1 + C / Number of Machines)
Machines(2 – N) Memory(Gb) * N
MDOF(Maximum) = C
4/22/2004

160. Parallel Performance for ANSYS
How much memory is required?
Example 1 for the Machine #1:
32 bit PC’s with 1 Gb RAM Each
8 Machines in Total
Solid92 or Solid187 models
1 (Gb)
MDOF Machine #1 (Maximum) =
( / 8)
= 6.15 MDOF!!!!
4/22/2004

161. Parallel Performance for ANSYS
How much memory is required?
Example 2 for the Machine #1:
32 bit PC’s with 2.2 Gb RAM Available (with the /3 Gb switch)
Total of 4 Machines in the Cluster
MSAVE not possible
2.2 (Gb)
MDOF Machine #1 (Maximum) =
( / 4)
= 6.3 MDOF!!!!
4/22/2004