【摘要】 本文在模态分析的基础上,对某车身骨架进行了随机有限元谱分析。为获得作用在车身骨架上的载荷谱,本文采用分步求解的思想,先求出轮胎—悬架系统在白噪声路面谱下的响应,然后以此作为车架输入谱,对车身骨架进行谱分析,求得车架在白噪声路面谱作用下的响应,为车身骨架的动态评价探讨了新方法。更多还原

【Abstract】 On basis of the modal analyze,stochastic finite element method spectrum analyze is done to the bus body frame.In this paper,to obtain the load spectrum which act the bus body frame,make use of the step method,first get the response of the tires-suspension in white noise road spectrum,then use the response as body frame’s input spectrum to analyze the body frame by the modal analyze,get the response of body frame under white noise spectrum excitement,and obtain a new method for the dynamic evaluation of body frame.更多还原