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Experimentální určení tlumení nosníku
Fučík, Ondřej ; Hadraba, Petr (referee) ; Rubeš, Ondřej (advisor)
This bachelor thesis deals with structural damping of metallic materials. The first part is research of damping properties, ways how to discover damping properties and short description of how to simulate viscoelasticity of materials, using mathematical models. The second part is focused on an experiment with beams of different lengths and materials. Mathematical models making is also part of solution. The third, last part is focused on results processing. Using mathematical models, damping ratios of beams are determined.
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NVH of gearbox housing for electric vehicles
David, Jan ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This master’s thesis deals with determination of NVH parameters of the gearbox housing for electric vehicle. The introduction part is focused on the theoretical knowledge of this issue. Subsequently, the deviations of geometry on the gearbox were measure by 3D scan method. The next part of thesis is focused on the modal analysis, which is solved by numerical approach and followed by experimental verification. During the numerical calculation solving, the influence of the screw preloading on the modal properties of the structure, was also taken into account. Numerical harmonic analysis was then performed and the results were compared with the experimental approach. The conclusion is devoted to material damping and comparison of the individual results.
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NVH of gearbox housing for electric vehicles
David, Jan ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This master’s thesis deals with determination of NVH parameters of the gearbox housing for electric vehicle. The introduction part is focused on the theoretical knowledge of this issue. Subsequently, the deviations of geometry on the gearbox were measure by 3D scan method. The next part of thesis is focused on the modal analysis, which is solved by numerical approach and followed by experimental verification. During the numerical calculation solving, the influence of the screw preloading on the modal properties of the structure, was also taken into account. Numerical harmonic analysis was then performed and the results were compared with the experimental approach. The conclusion is devoted to material damping and comparison of the individual results.
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|
|
Experimentální určení tlumení nosníku
Fučík, Ondřej ; Hadraba, Petr (referee) ; Rubeš, Ondřej (advisor)
This bachelor thesis deals with structural damping of metallic materials. The first part is research of damping properties, ways how to discover damping properties and short description of how to simulate viscoelasticity of materials, using mathematical models. The second part is focused on an experiment with beams of different lengths and materials. Mathematical models making is also part of solution. The third, last part is focused on results processing. Using mathematical models, damping ratios of beams are determined.
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