吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (3): 719-725.doi: 10.13229/j.cnki.jdxbgxb201503006

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Modal analysis and structure optimization of bus floor based on floor vibration control

KE Jun1, CHENG Zhi-yong1, SHI Wen-ku1, SHI Teng1, ZHANG Yi-jing2, GUO Fu-xiang2   

  1. 1.State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun 130022, China;
    2.Product Engineering Department,Nanjing Automobile Group Co., Ltd., Nanjing 210028,China
  • Received:2013-12-09 Online:2015-05-01 Published:2015-05-01

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Abstract: The rear area of the floor of light bus experiences severe vibration under high speed working condition. In order to solve this problem, order tracking analysis and modal analysis of the floor were performed to identify the root cause. It was found that the excitation frequencies of the engine and transmission system are overlapped with the modal frequencies of the floor, which has some local bump modals, resulting in resonance. A finite element model, including the body and frame of the floor, was established using HyperWorks software. Model sensitivity analysis and size optimization of the thickness of floor the beams were carried out using the OptiStruct module in HyperWorks. Then an optimal scheme was designed according to the finite element analysis results and the verification test was conducted. The test results demonstrate that the investigation method and the proposed optimal scheme can effectively control the severe vibration of the floor with low cost.

Key words: vehicle engineering, bus floor vibration, modal analysis, sensitivity analysis, structural optimization

CLC Number: 

  • U463.82
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