基于逆虚拟激励法的随机路面谱的识别方法

采用逆虚拟激励法对随机路面谱的识别方法进行了理论推导,并用确定性方法求解车辆平稳随机振动路面谱的识别问题.求解过程中通过给定车辆振动响应的自功率谱和互功率谱,反求路面激励功率谱,然后再计算得出车辆对路面激励的振动响应功率谱.通过模拟仿真,对比了计算路面谱与实际路面谱的差异,验证了推导结果的有效性.研究结果表明,逆虚拟激励法在求解车辆振动响应路面谱方面,具有很好的求解精度和计算效率.该方法为车辆振动平顺性的研究提供了新的思路和方法,具有很好的应用前景.

Identification of Random Road Spectrum Based on Inverse Pseudo-Excitation Method

The inverse pseudo excitation method was adopted to identify the random road spectra,and a road spectrum identification alogorithm for stationary random vibration of vehicles was deduced by a deterministic method.The power spectrum of road excitation was inversely deduced with the self-power spectrum and cross-power spectrum given,and then the power spectrum of vehicle vibration response to road excitation was calculated.The simulation compared the difference of the calculated and the actual road spectra and validated applicability of the deduction results.The results show that the inverse pseudo excitation method has good accuracy and high efficiency for solving the road spectrum,and it provides a new way to research vehicle vibration comfort and has a wide application prospects.