某SUV白车身模态仿真与试验对标分析

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摘 要：以某SUV白车身为研究对象，基于有限元和试验模态分析理论，建立有限元和几何模型，分析结果。对比有限元分析模态与试验模态，白车身有限元模型的有效性得以验证，并对两者结果的差异性进行分析。通过仿真手段对白车身进行分析，可缩短开发周期、降低成本有重要意义，对白车的设计开发有指导作用。

关键词：白车身 模态 仿真 试验

Analysis on Modal Simulation and Test for a SUV Body-in -white

Tang Yulin Zhang Hongjun Shan Fukui Wang Chaojian Li Huabin Wang Zhenxin

Abstract：The modes of vibration of a SUV’s body-in-white was investigated. According to FEM and test modal analysis theory， the FEA model and geometry model was done to analyze body-in white. Comparing the results of modal simulation and modal test， the validity of the FEM of the body-in-white is verified， and the difference between the two results was analyzed. The modal analysis of body-in-white by FEA model is also important to ishortening R&D period and saving costs， and guiding the design and development of body-in-white.

Key words：body-in-white; modal; simulation; test

汽车在行驶过程中车身会受到外部激励而产生振动，当外部激励与车身系统固有频率一致或接近时将引起共振，共振将导致剧烈振动并产产生结构噪声，还会对车辆部件的耐久可靠性产生严重影响[1]。（剩余3413字）