基于虚拟激励法的汽车振动系统仿真分析

讨论了虚拟激励法的基本理论,构造了汽车振动系统组成环节的虚拟激励,以包含4自由度人体模型、单自由度座椅模型、单自由度车身模型的汽车振动系统为研究对象,使用虚拟激励法求解出系统振动响应的频响函数,将功率谱密度应用于该振动系统,推导了人体模型中各组成垂直加速度的功率谱密度。在给定条件下,应用自编程序进行仿真分析,给出了计算结果。

Simulation of Automotive Vibration System Based on Virtual Excitation Method

The grounded theory of virtual excitation method was discussed.The component's virtual excitation of an automotive vibration system was constructed.It was applied to an automotive vibration system consisted of four degrees of freedom human body model,a single degree of freedom seat model,a single degree of freedom automotive body model.The frequency response function of the system vibration response was solved by using the virtual excitation method.Power spectrum density was applied to the vibration system model,and vertical acceleration power spectrum density of relevant components in the human body model mentioned above was derived.Under specific settings,self-programming software was used for the simulation purpose,and the results were provided.