Finite Element Analysis

Transcription

1 Finite element analyses for engineering and design Illustration courtesy of MTU Friedrichshafen GmbH, Friedrichshafen, Germany Finite Element Analysis Comprehensive engineering services for various industries from a single source

2 Sophisticated finite element analyses from experts Complex FE analyses are our specialty Complex FE analyses are a challenge even for experienced fi nite element users. Our special focus is on such demanding tasks, because we have special expertise and many years of experience in the FEM world. Furthermore, our comprehensive know-how from various industries and the corresponding techno logy transfer facilitates a quick approach to your specifi c task. We provide measuring technology and simulation from a single source because their combined application is often required to solve diffi cult vibration and acoustic problems. Thus we offer several advantages over other providers of fi nite element analyses and we are exactly the right partner for solving complex problems. Professional tools We are experienced in various fi nite element programs and we always use the most suitable one for a specifi c task. We work with Program CAE, HyperMesh, Femap Abaqus, Nastran, Ansys TOSCA, OptiStruct Abaqus, Simpack MDesign SolidWorks Matlab, Simulink Matlab, MEDA, MEScope Application Finite element modeling Finite element method (FEM) Finite element analysis (FEA) Optimization Multi-body simulation (MBS) Machine elements Computer-aided design (CAD) Control technology Measurement data processing What we can do for you We provide our sophisticated FE analyses and other simulations as well as measuring services in the engineering process to design optimized structures, for problem solving when immediate assistance is required and during product development, when fundamentally new concepts have to be worked out. Furthermore, we provide expert advice in all matters of simulation and measuring technology. Your benefits Time savings during product development Cost savings due to design optimization Competitive advantage through the use of external know-how High effi ciency thanks to our many years ' FEM experience support Engineering Problem solving Customer Engineering service Consulting

3 Simulation during the design process Project example: Development of a torque converter A torque converter is a complex device in which several technological functions interact in a very small space. Our task is to ensure the technical functions as well as the strength and the service life of the torque converter by means of simulations in the product development phase. This requires the calculation of numerous static and dynamic load combinations, the so-called load cases, on sometimes very detailed models (up to 1 million degrees of freedom and more). Torsion damper Turbine blade Converter housing Based on our customer s CAD data we build the corresponding models for our simulation software, using the necessary cleaning and abstraction techniques (regarding geometric details, loads, etc.). Our customers particularly appreciate the clear representation and the subsequent thorough interpretation of results, providing a perfect summary of the issue. Due to their many years of experience, our engineers focus on the essentials: In this way we ensure that the products for which we provide the simulation always combine mechanical solidity with economic effi ciency. Illustration courtesy of ZF Friedrichshafen AG, Schweinfurt, Germany Sophisticated finite element analyses from experts

4 Problem solving Project example: Squeaking of a bicycle brake There had been increasing complaints about squeaking brakes of bicycles with drum brakes for the Dutch market. Our task was to identify the cause and to work out suggestions how to im - prove the product. The fi rst step was the acoustic measurement of the bicycle brake. The included frequency analysis clearly showed the squeaking disturbance frequency. Accompanying experimental modal analyses, e.g. with a scanning laser vibrometer, verifi ed the simulation models. By means of specifi c variant simulations it was thus possible to show successful ways to prevent the squeaking noise. sound pressure / mpa time / s Airborne noise analysis Drum brake With complex simulation models of brake drum and brake shoe our engineers managed to identify the specifi c mode of vibration that is responsible for the acoustic emission the squeaking. In addition, they could detect the mechanism of action which excites this mode of vibration. Solving diffi cult acoustic and vibration problems often requires the combined use of measuring equipment and simulation. We offer both from one expert source. Vibration simulation brake drum Vibration simulation brake shoes Illustration courtesy of SRAM Deutschland GmbH, Schweinfurt, Germany

5 Engineering services Project example: Design of a crash element For a safety-relevant facility we had to develop a crash element for a very large mass (150 t), which limits the loads on the ceiling of a building in case of a crash. Our engineers tackled the task from scratch: First the ideal force-displacement characteristic of the crash element was determined, taking into consideration the permissible ceiling load. Then the different principle solutions that had been tested by computer simulation were measured by this ideal characteristic. Finally, technology transfer was the solution: Thanks to our experience and our contacts in almost all industry sectors we could fi nd a manufacturer who can produce customizable crash elements with honeycomb structure. He produced a crash element according to our specifi cations and by means of tolerance analyses our engineers carefully ensured the function of the crash element under any imaginable circumstances. Preparations for the crash test The designed solution was then subjected to a 1:1 test in which its effectiveness was impressively confi rmed. Deformed crash element Computer simulation of the crash test compression crash element (mm) V1 V2 V3 V4 F max Force Tolerance analyses max. deformation time (sec) Ideal Standard spring Ideal force-displacement characteristic Displacement Illustration courtesy of EnBW Kernkraft GmbH, Obrigheim, Germany Sophisticated finite element analyses from experts

6 The company its experience... PL AHA-04/2008 Your personal contact Dipl.-Ing. Eric Feldbausch Phone: Fax: Hoechberg Max-Planck-Str. 15 Phone: Fax: wbi@woelfel.de Wölfel Beratende Ingenieure GmbH + Co. KG 2014 FEB Subject to changes MÜ-01-E