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Design of rocker for mountain bike shock absorber using topology optimization
Zalibera, Tomáš ; Hurník, Jakub (referee) ; Vaverka, Ondřej (advisor)
Submitted bachelor thesis deals with research and comparison of topology optimization software. A given component is 3D scanned, after that, kinematics model is done to define possible load cases. Then, topology optimization is done in four selected software. Results from topology optimization are then validated in FE analysis to acquire maximum deformation and stress. After the FEA the best variant is chosen, which is additionally modified to reach sufficient level of safety factor. The discussion and conclusion chapter deals about final comparison of topology optimization software based on FEA resuls and the most suitable software is choosen, in which decrease of deformation by 27% was achieved with a level of weight a bit lower as with the original rockers.
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Solving the moving mass problem on large finite element models with modal analysis – estimation of the discrete movement error
Bayer, Jan
Solving transient dynamic problems on large finite element (FE) models using a direct integration requires a high sampling rate and therefore also considerable computing times because of the large system matrices. Movement of a mass on a FE model has to follow the discrete pattern of the FEs, and is therefore of a discrete character. This introduces an unknown\nerror into the analytical results. Applying modal analysis (MA) reduces the number of equations used in the subsequent numerical integration by orders of magnitude. Resampling of the mode shapes to the required sampling rate makes it possible to solve the moving mass problem much more quickly and quasi-continuously. The performed comparative analytical study using ANSYS and MATLAB showed that using a discrete movement on the FE mesh when solving a moving mass problem can cause a considerable error.
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Design of rocker for mountain bike shock absorber using topology optimization
Zalibera, Tomáš ; Hurník, Jakub (referee) ; Vaverka, Ondřej (advisor)
Submitted bachelor thesis deals with research and comparison of topology optimization software. A given component is 3D scanned, after that, kinematics model is done to define possible load cases. Then, topology optimization is done in four selected software. Results from topology optimization are then validated in FE analysis to acquire maximum deformation and stress. After the FEA the best variant is chosen, which is additionally modified to reach sufficient level of safety factor. The discussion and conclusion chapter deals about final comparison of topology optimization software based on FEA resuls and the most suitable software is choosen, in which decrease of deformation by 27% was achieved with a level of weight a bit lower as with the original rockers.
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