【摘要】 建立了9自由度整车模型,从理论上论述了多点虚拟激励法。构造了路面对整车的路面虚拟激励,求取了汽车虚拟振动响应量,并由此算出了汽车真实振动响应量的功率谱密度。结果表明,虚拟激励法在汽车随机振动分析中的应用和傅里叶分析方法同样有效,却简单得多。更多还原

【Abstract】 A 9 DOFs vehicle model is built,and the multi-point pseudo excitation method is theoretically expounded.Then the pseudo road excitation on complete vehicle is constructed,and the pseudo vibration response variables are obtained.Finally the power spectral densities of vehicle real vibration response variables are calculated.The results show that in application to vehicle random vibration analysis,pseudo excitation method is as effective as Fourier analysis method but much simpler.更多还原