【摘要】 为了在汽车振动分析中推广虚拟激励法,以易于理解的方式对虚拟激励法的基本理论进行了论述。根据路面激励的统计特征,应用虚拟激励法建立了汽车前轮和后轮的虚拟路面激励。基于虚拟激励法,推导了1/2汽车四自由度系统振动的频率响应特性,建立了求取汽车系统振动响应量及其功率谱密度的公式,给出了求解汽车振动响应量功率谱密度的算例。结果表明:在对1/2汽车四自由度系统进行振动分析时,虚拟激励法是比傅里叶分析方法更简单的方法。更多还原

【Abstract】 To apply pseudo excitation method to automotive vibration analysis,the basic theory of pseudo excitation method is summarized and discussed in an easy of understanding way.According to the pseudo excitation method,the pseudo road excitations in automotive front wheel and rear wheel are constructed by the statistical characteristics of road excitation.Based on pseudo excitation method,the frequency response characteristics of four freedom half model of an automotive system is deduced,and a formulae for calculating automotive vibration responses and their power spectrum density is presented.A car is selected to compute the power spectrum density of the car vibration responses.The results show that pseudo excitation method is more simple than Fourier analysis for studying four freedom half model of the automotive system vibration.更多还原