We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byMarcella Sims
Modified over 2 years ago
© Fraunhofer Improved fatigue design methods for offshore wind turbine rotor blades considering non-linear Goodman analysis combined with finite element analysis Stefan Wessels Michael Strobel Dr. Arno van Wingerde Isabel Koprek Dr. Hans-Gerd Busmann
© Fraunhofer Outline Idea & Motivation Used Fundamentals Structural Model Programming the fatigue Analysis based on NLGD´s Validation Fatigue Analysis on a rotor blade model Conclusion & Outlook
© Fraunhofer Idea & Motivation Square – Cube – Law leads to increasing blade weights Conservative approaches in blade design Material properties of fiber composites can be exploited further Goal: Weight & Cost reduction in the early design stage Track: Damage calculation using FEM and Non-Linear-Goodman-Analysis http://www.enercon.de
© Fraunhofer Used Fundamentals Non-Linear-Goodman-Diagram (NLGD) Rain-Flow-Counting Miner-Sum
© Fraunhofer Structural Model FEM-Rotor-Blade-Model Model generated with FOCUS ANSYS-Solver 8-noded SHELL99-Elements 4-noded SHELL181-Elements Loads applied on arbitrary cross section CARDS (JAVA - Open-Source Postprocessor)
© Fraunhofer Principal procedure Programming the fatigue Analysis based on NLGD´s
© Fraunhofer Programming the fatigue Analysis based on NLGD´s Programming the NLGD Transforming S-N-curve data Determination of maximum number of cycles out of NLGD Using method to find a point in a triangle Logarithmic interpolation φ
© Fraunhofer Validation Results are compared with FOCUS FOCUS beam model Improved method 3D FEM-Model Four points on an arbitrary cross section are investigated Comparison of damage for UD-Laminate and +/- 45°-Laminate Three different approaches
© Fraunhofer Validation Comparison of the results Big deviations Comparison of strain-time-series Factor k to adjust the damage calculation
© Fraunhofer Fatigue Analysis on a rotor blade model Transition zone of webs of particular interest Analysis of: UD-Laminate in spar caps +/-45°-Laminate for outer shell Adhesive bonding
© Fraunhofer Fatigue Analysis on a rotor blade model Results of the damage calculation Damage of UD-Lamiante in the spar caps Increasing damage towards the tip due to: Deceasing thickness and cross section area Constant load on the blade section Change from two to one web Damage of +/-45°-Lamiante Damage of adhesive bonding
© Fraunhofer Conclusion & Outlook The Improved fatigue design method helps: Enhancing the material usage Detecting critical areas in terms of fatigue Increases the accuracy of the material prediction (using NLGD´s) Issues to improve Check other approaches for damage accumulation The way of applying loads on 3D-FEM-Models
© Fraunhofer Thank you for your attention! Dziękuję bardzo!
Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy’s National Nuclear.
POLI di MI tecnicolanotecnicolanotecnicolano MULTI-DISCIPLINARY CONSTRAINED OPTIMIZATION OF WIND TURBINES C.L. Bottasso, F. Campagnolo, A. Croce Politecnico.
DEWEK 2004 Lecture by Aero Dynamik Consult GmbH, Dipl. Ing. Stefan Kleinhansl ADCoS – A Nonlinear Aeroelastic Code for the Complete Dynamic Simulation.
Wind turbine blade design using FEM AFOLABI AKINGBE WEI CHENG WENYU ZHOU.
Challenge the future Delft University of Technology Blade Load Estimations by a Load Database for an Implementation in SCADA Systems Master Thesis.
PROJECTS WITH POTENTIAL FUNDING 1- TÜBİTAK 1001 Project: Determination of the bending-twisting coupling in composite structures via digital image correlation.
Deviation = The sum of the variables on each side of the mean will add up to 0 X
1 Challenge the future Subtitless On Lightweight Design of Submarine Pressure Hulls.
Department of Tool and Materials Engineering Investigation of hot deformation characteristics of AISI 4340 steel using processing map.
FEA of structures with insulation damage in fire A.M.Khaskia (Mallett) Dat Duthinh (NIST) FEMCI Workshop 2006 October FINITE ELEMENT MODELING CONTINUOUS.
LaRC Test Cases for Modeling and Validation of Structures with Piezoelectric Actuators Mercedes C. Reaves and Lucas G. Horta Structural Dynamics Branch.
28,72m 26,00m EMBRAER 195 EMBRAER 170 EMBRAER 190 EMBRAER ,65m 29,90m 9,67M 36,24m 10,28 m 31,68m 9,73 m Passengers: 70 Cruise Speed: Mach 0.8 Range:
Life prediction based on material state changes in ceramic materials Ken Reifsnider Mechanical Engineering University of Connecticut Storrs, CT Scott.
POLI di MI tecnicolanotecnicolanotecnicolano INTEGRATING ACTIVE AND PASSIVE LOAD CONTROL IN WIND TURBINES C.L. Bottasso, F. Campagnolo, A. Croce, C. Tibaldi.
OPTIMAT BLADES Workshop OPTIMAT BLADES: RESULTS AND PERSPECTIVES OPTIMAT BLADES: RESULTS AND PERSPECTIVES Arno van Wingerde.
46th SIAA Structures, Dynamics and Materials Conference Austin, TX, April 18-21, 2005 Application of the Generalized Conditional Expectation Method for.
Distribution of Defects in Wind Turbine Blades & Reliability Assessment of Blades Containing Defects Authors: Henrik Stensgaard Toft, Aalborg University.
Controller design for a wind farm, considering both power and load aspects Maryam Soleimanzadeh Controller design for a wind farm, considering both power.
Working at the heart of test & measurement Fatigue Life Analysis Suite.
Design of Steel and Composite-Structures for Seismic Loading – Safety Requirements, Concepts and Methods – Prof. Dr.-Ing. Ekkehard Fehling, University.
Influence of Overload Induced Residual Stress Field on Fatigue Crack Growth in Aluminum Alloy Jinhee Park (M.S. Candidate) Date of joining Masters’ program.
APPROACH FOR THE SOLUTION OF A SIMPLIFIED REISSNER THEORY OF ELASTIC PLATES - APPLICATION IN THE AUTOMOTIVE INDUSTRY- ICSAT
Computational Modelling of Unsteady Rotor Effects Duncan McNae – PhD candidate Professor J Michael R Graham.
Moving Towards Large(r) Rotors Is that a good idea? P. K. Chaviaropoulos, CRES H.J.M. Beurskens, SET Analysis S.G. Voutsinas, NTUA EWEA 2013 Conference.
MAE Advanced Computer Aided Design Your Name Title Place, Date.
Investigation of Distortion-Induced Fatigue Cracking in a Seismically-Retrofitted Bridge Riyadh Hindi, PhD, PEng Will Lindquist, PhD, PE Ahmed Ibrahim,
Failure of laminated composites Progressive failure is needed to predict ultimate failure We will limit ourselves to first ply failure.
1 FINITE ELEMENT APPROXIMATION Rayleigh-Ritz method approximate solution in the entire beam –Difficult to find good approximate solution (discontinuities.
Modelling and optimal design of sheet metal RP&M processes Meelis Pohlak Rein Küttner Jüri Majak Tallinn University of Technology 2004.
Finite Element Study of Bond-Slip Behaviour of CFRP and GFRP Laminates on Brick Masonry Candidate:Chi Chiu Lam Supervisors:Prof. M. R. Valluzzi Dr. E.
A Methodology for a Decision Support Tool for a Tidal Stream Device Andrew Cooper Julen Garcia-Ibanez Ciaran Gilbert Stuart Mack Xabier Miquelez de Mendiluce.
Simulation of Fibrous Scaffold Optimal Distribution by Genetic Algorithm Presentation : D. Semnani ICSIP 2009, Amsterdam Isfahan University of Technology.
05/04/05 FEM Analysis of PA 44 Engine Mount PIPER SEMINOLE –PA-44 TWIN ENGINE AIRCRAFT.
Modelling unknown errors as random variables Thomas Svensson, SP Technical Research Institute of Sweden, a statistician working with Chalmers and FCC in.
Principal Investigators: Jeffery Roesler, Ph.D., P.E. Surendra Shah, Ph.D. Fatigue and Fracture Behavior of Airfield Concrete Slabs Graduate Research Assistants:
Damage tolerance of adhesively bonded structures Background Adhesive bonding promises to allow the design of lighter weight structures. Before adhesive.
Multilevel Distributed Structure Optimization Jorg Entzinger Roberto Spallino Wout Ruijter.
Accuracy of calculation procedures for offshore wind turbine support structures Pauline de Valk – 27 th of August 2013.
DESIGN OF AXIAL FLOW COMPRESSORS Proper Integration of Mild Compression Stages !!! P M V Subbarao Professor Mechanical Engineering Department.
Effects of Scale on Model Offshore Wind Turbines An Examination of How Well Scaled Model Wind Turbines Can Represent Full Sized Counterparts Group Members:
2009 Mathematics Standards of Learning Training Institutes Algebra II Virginia Department of Education.
Wind Energy Program School of Aerospace Engineering Georgia Institute of Technology Computational Studies of Horizontal Axis Wind Turbines PRINCIPAL INVESTIGATOR:
1 FEM study of the faults activation Technische Universität München Joint Advanced Student School (JASS) St. Petersburg Polytechnical University Author:
Mechanics of Materials – MAE 243 (Section 002) Spring 2008 Dr. Konstantinos A. Sierros.
Advanced Wind Turbine Controls Input Based on RealTime Loads Measured with Fiber Optical Sensors Embedded in Rotor Blades ewec 2006, Athens 28 February.
3D Analysis with AASHTOWare Bridge Design and Rating 1.
Prediction of Load-Displacement Curve for Weld-Bonded Stainless Steel Using Finite Element Method Essam Al-Bahkali Jonny Herwan Department of Mechanical.
POLI di MI tecnicolanotecnicolanotecnicolano INTEGRATED ACTIVE AND PASSIVE LOAD CONTROL IN WIND TURBINES C.L. Bottasso, F. Campagnolo, A. Croce, C. Tibaldi.
EWEC2007 Milano, 8 May 2007 Extrapolation of extreme loads acc. to IEC Ed.3 in comparison with the physics of real turbine response Dirk Steudel,
© 2017 SlidePlayer.com Inc. All rights reserved.