虚拟激励法及其在汽车随机振动应用中的探讨

Vitual Excitation Method and Its Application to Automotive Random Vibration

论述了虚拟激励法,为探讨其应用于汽车随机振动的可行性,构造了虚拟路面激励。以1/4汽车单自由度振动系统为对象,由虚拟激励法推导出系统和振动响应量的频率响应特性,提出了求取系统振动响应量功率谱密度的新方法,给出了应用虚拟激励法求解汽车随机振动的计算实例。结果表明,虚拟激励法是比傅里叶分析方法更为简便的时频研究方法。

This paper discusses vitual excitation method and constructs vitual road excitation for discussing the feasibility of this method applied to automotive random vibration.According to one quarter freedom model of automobile,the frequency-response characteristics of the system and system vibration responses are deduced based on vitual excitation method,a new method is put forward for calculating power spectrum density of system vibration responses,and an example is given for automotive random vibration.The results show that vitual excitation method is a more simple research method in comparison with Fourier analysis method.