某微型车驾驶室座椅导轨怠速异常振动分析与改进

摘要

A rigid body dynamics model for the power assembly suspension system is established in this paper with natural frequency and energy distribution of the system obtained. Besides, the operational modal parameters for the suspension vibration isolation system of the power assembly are obtained by vehicle modal tests. Through analysis, reasons for abnormal vibration of a mini van's driving cab seat rail in idling condition are found. Then the suspension system of the vehicle is optimized and the newly-made sample is verified. Test results show that with the combination of modem testing method and dynamic simulation analysis, we can pertinently improve the design of the suspension system and shorten the NVH testing cycle.%建立了动力总成悬置系统刚体动力学模型并获得系统固有频率和能量分布,由整车状态下模态试验得出了动力总成悬置隔振系统的运行模态参数,通过分析找到了某微型车座椅导轨怠速异常振动的原因.对该车型悬置系统进行了优化,重新制作样件进行了验证.试验结果表明,现代测试手段和动态仿真分析技术相结合,能有针对性的对悬置系统进行改进设计并缩短整车NVH调试周期.