摘要
基于车路相互作用建立了简化的双自由度四分之一车辆振动模型,以路面不平整度为激励,描述了路面不平整度的功率谱密度,运用随机振动理论分析了不平整路面上的车辆对路面的随机动压力。实例分析表明,动载系数随着车速和路面不平整度的增加而增加,动载系数是反映随机动压力大小的重要参数。
A simple quarter - vehicle model with two freedom degrees was founded on the basis of vehicle - road interaction, and the pavement surface roughness （PSR） was considered as excitation causes. The power spectral density （PSD） of the roughness of the road was described. The stochastic vibration theory was used to analyze the stochastic dynamic pressure of vehicle on rough pavement. Example analysis shows that the dynamic load coefficient increases along with the increase of vehicle velocity and PSR. Dynamic load coefficient is the important parameter reflecting the stochastic dynamic pressure.
出处
《河北工程大学学报（自然科学版）》
CAS
2009年第3期63-66,共4页
Journal of Hebei University of Engineering:Natural Science Edition
基金
河北省自然科学基金项目(2009420)
关键词
车辆振动模型
路面不平整度
功率谱密度
随机振动理论
vehicle vibration model
pavement surface roughness（PSR）
power spectral density （PSD）
stochastic vibration theory
