基于随机振动试验的车载座舱数值分析及结构优化

Numerical analysis and structure optimization of vehicle cabin based on random vibration test

针对道路运输工况下车载座舱遭受随机振动激励而损伤的问题,研究座舱的随机振动响应特性。对座舱试验件进行振动台试验,获得试验件在不同工况下的加速度、应变、应力等动力学响应数据,据此建立座舱数值分析模型并进行随机振动响应分析计算。通过与振动试验结果对比,验证数值分析方法的合理性。对数值分析模型进行全工况计算,将仿真与试验结果相结合进行随机振动响应分析。根据结构振动特性与失效机理,对座舱结构进行优化设计,使其满足抗震要求。

As to the issue of damage of the vehicle cabin caused by random vibration excitation under road running conditions,the random vibration response characteristics of the cabin is studied.The vibrating table test of the cabin test piece is carried out,and the dynamic response parameters,such as acceleration,strain,and stress of the test piece under different working conditions is obtained.Based on this,a numerical analysis model for the cabin is built,and the random vibration response analysis and calculation is completed.The rationality of the numerical analysis method is verified by comparing it with the vibrating test results.The full operating condition parameters is calculated on the numerical analysis model,and the random vibration response is analyzed combining simulation and test results.Based on the structure vibration characteristics and failure mechanisms,the cabin structure is optimized,which meets the vibration resistance requirements.