1. Realistic multiphysics analysis
Óbuda University
John von Neumann Faculty of Informatics
Institute of Applied Mathematics
Master in Engineering Informatics and Applied Mathematics
Course System Level Modeling for Cyber-Physical Engineering Structures in the Cloud
Lecture and laboratory No. 05
Realistic multiphysics analysis
Dr. László Horváth

2. László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/
This presentation is intellectual property. It is available only for students in my courses.
The screen shots in this presentation were made in the CATIA V5 and the V6 PLM systems as well as the 3DEXPERIENCE platform at the Laboratory of Intelligent Engineering systems, in the course of active modeling process.
The CATIA V5 és V6 PLM systems as well as the 3DEXPERIENCE platform are operated at the above laboratory with the support of Dassult Systémes Inc. and CAD-Terv Ltd.
László Horváth UÓ-JNFI-IAM

3. László Horváth UÓ-JNFI-IAM http://users.nik.uni-obuda.hu/lhorvath/
Contents
Lecture
Approximative analysis of performance parameters in engineering structures.
Analysis on the principle and method of finite analysis (FEM/FEA).
Finite elements in mesh and meshing.
Analyzed parameters and load model.
Solutions and mathematics background.
Realistic multiphysics analysis.
Definition of structured simulations in model.
Laboratory task
Slm_CS_05 case study: Multiphysics analysis using FEM/FEA.
László Horváth UÓ-JNFI-IAM

4. Approximative analysis of performance parameters in engineering structures
has impact on the performance of an object. It is analysed in model and drives object parameters which are in contextual connection with it.
Approximative analysis
Evaluates performance does not parameter in a solid body continuously. Instead, analysia is done in discrete points- Typical method is based on finite elements.
Engineering structure
is a combination of contextual objects to establish product, unit of product, or experimental arrangement.
László Horváth UÓ-JNFI-IAM

5. Analysis on the principle and method of finite analysis (FEA)
Finite Element Analysis (FEA) of Finite Element Model (FEM)
Finite element method is a numerical method. Values of parameters are calculated using mathematical functions.
FEA analyses effect of design variables on parameters which have influence acting on engineering object performance
The method is suitable for calculation of place dependent parameters at any point of a discretized solid.
Analysis is done on finite number of finite elements. The method is approximation by finite elements in mesh. Parameters are calculated at nodes.
László Horváth UÓ-JNFI-IAM

6. Analysis on the principle and method of finite analysis (FEA)
Essential process
Shape model
Complete: reference elements are added (plane, line, midsurface, etc.)
Simplify: intricate shapes with low load are simplified to equivalent model.
Mesh of finite elements
Analyze, correct, improve and optimize mesh
Select parameter to analyze and solution
Add load model: definition of loads and restraints and placing them in nodes in mesh or geometric elements in boundary.
László Horváth UÓ-JNFI-IAM

7. Finite elements in mesh and meshing
Linear
Shape is linear or linearization is allowed.
Two or three degrees
One or two intermediate node on edge.
One dimensional
Two dimensional shell
Three dimensional shell
Solid
Accurate fitting to geometry.
Order of edges can be restricted (E. g. Max. order is 5).
Pi elements:
Node
Edge
László Horváth UÓ-JNFI-IAM

8. Finite elements in mesh and meshing
Essential
Parametric mesh generation associative with geometric model on
curves,
surfaces,
solids,
Solids including holes, and inside cavities.
Recognition of reference geometry.
Recognition of nodes for further build of mesh.
Grouping elements.
Manually controlled automatic mesh generation
Definition of global and local mesh density.
Automatic density transition.
Automatic mesh generation on geometry.
User mesh definition points using points, curves, and surfaces.
Specification of mesh distortion.
Automatic minimal mesh distortion.
Topological based generation.
Mesh for group of surfaces. Sectioning on the basis of topology.
Inactivating form features.
Adaptive mesh generation
Minimizing the mesh caused analysis error by automatic modification of
Mesh density,
element order, and
element shape
on a formerly generated coarse mesh.
Analysis of error: normal, element distortion.
Dividing element. Replacing node. Repeated meshing.
In case of shell mesh different number of elements on opposite sides.
László Horváth UÓ-JNFI-IAM

9. Analyzed parameters and load model
stress, deformation, their gradient, pressure,
inside force, reaction force,
torque,
strain energy,
natural frequency,
temperature, its gradient, heat flow,
Magnetic field.
At composite materials: analyses by layer and layer tear.
László Horváth UÓ-JNFI-IAM

10. Analyzed parameters and load model
Loads
On point, edge, curve, surface, and section.
On nodes and elements
By mathematical function.
On surface which passes over predefined points.
Restraints
Degrees of freedom.
Base mechanical types for 1R, 1T, 2T, etc.
Virtual part: by definition of 3T, 3R, implicit.
Node displacement.
László Horváth UÓ-JNFI-IAM

11. Solutions and mathematics background
Linear
The analyzed parameter is proportional to the load in the analysis range..
Static
The analyzed parameter does not change in the function of time.
Dynamic
The analyzed parameter changes in the function of time: natural frequency, vibration.
Nonlinear
It is taken into consideration that the analyzed parameter change to load is non linear in certain conditions.
László Horváth UÓ-JNFI-IAM

12. Realistic multiphysics analysis
Mostly based on the principle of finite elements.
Finding how object will response to the real effects from the physical world.
Multi physical problem is to be solved for multi-physics analysis of the response.
It may involve linear and nonlinear solids, fluids, heat transfer, vibration, electromagnetic, and other elements.
Coupled behavior may be also to be modeled between multiply physical responses.
Realistic simulation is aimed to assure realistic behavior representation of engineering objects.
This behavior must be experienced during the operation of engineering object.
Its analysis needs simulation of realistic operation environment.
László Horváth UÓ-JNFI-IAM

13. Definition of structured simulations in model
Virtual Product Modeling (VPM, ENOVIA in the V6 product)
Engineering team with a single PLM environment to manage product development processes and complex product structure with traceability.
Collaborative virtual product management (VPM) of complex product, process, and resource information for lifecycle.
Design, manufacturing, and simulation of intellectual property (IP).
Predefined design tasks, design modifications and design impact analyses to evaluate potential alternatives or changes.
Complete digital validation process.
Optimize product designs with potential variations in mind.
László Horváth UÓ-JNFI-IAM

14. Definition of structured simulations in model
Simulations are modeled and applied in contextual structure
Realistic simulations are included.
Information and processes reproduce the simulated scenario .
Product related simulations.
It is associated with PLM level modeling.
Elements of a simulation
Context model in which a simulation is executed.
Scenario includes the objects that provide the instructions to perform the simulation.
Result includes the results of the simulation.
László Horváth UÓ-JNFI-IAM

15. Slm_CS_05 case study: multiphysics analysis using FEM/FEA
Definition of thematic model and its analysis and understanding for lecture issues as individual laboratory work of each student.
Issues
Geometric model for FEM
Information structure for FEM and FEA
Contextual mesh generation and modification.
Load model.
Contextual calculations.
Solving different problems in a single FEM and FEA.
Iso-static restraint.
Role of sensors.
Discussion of results.
László Horváth UÓ-JNFI-IAM

16. Multiphysics analysis
Structure of connected shape model
László Horváth UÓ-JNFI-IAM

17. Multiphysics analysis
László Horváth UÓ-JNFI-IAM

18. Multiphysics analysis
László Horváth UÓ-JNFI-IAM

19. Multiphysics analysis
Structure of connected shape model
László Horváth UÓ-JNFI-IAM

20. Multiphysics analysis
Structure of connected shape model
László Horváth UÓ-JNFI-IAM

21. Multiphysics analysis
Structure of connected shape model
László Horváth UÓ-JNFI-IAM

22. Multiphysics analysis
Structure of connected shape model
László Horváth UÓ-JNFI-IAM

23. Multiphysics analysis
László Horváth UÓ-JNFI-IAM