发动机橡胶悬置特性的试验与建模研究  

Test and Modeling of Characteristics of an Engine Rubber Mount

作　　者：李锐[1,2] 陈伟民[1] 廖昌荣[1] 周正平[3] 李银国[2] 

机构地区：[1]重庆大学光电技术及系统教育部重点实验室,重庆400030 [2]重庆邮电大学网络化控制与智能仪器仪表教育部重点实验室,重庆400065 [3]国家客车质量监督检验中心,重庆400067

出　　处：《中国机械工程》2009年第22期2746-2750,共5页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(60674097);中国博士后科学基金资助项目(20070410204);国家863高技术研究发展计划资助项目(2006AA03Z104);重庆市自然科学基金资助项目(CSTC;2008BB2407);重庆市教委科技计划资助项目(KJ080501)

摘　　要：发动机橡胶悬置的动静态特性对隔振性能具有重要影响。设计了橡胶悬置特性测试系统,在不同频率和振幅的正弦位移激振下,测试了悬置的动静态特性;建立了悬置的动力学模型,采用最小二乘优化法对模型参数进行了识别。结果验证了模型对单一工况参数识别的有效性,表明悬置动刚度对激振频率和振幅有较大的非线性依从性,滞后角受激励影响较小;在受60Hz以上小振幅激励时,橡胶悬置隔振性能变差。The static and dynamic characteristics of an engine rubber mount are very important to isolation performance. An experimental system of the characteristics of a rubber mount was built. Static tests and dynamic tests were carried out by using sine displacement signals with different excitation frequencies and amplitudes. Then a dynamic model of the rubber mount was proposed. The least square optimization method was used to identify parameters of this model. Therefore, the effectiveness of this model for parameter identification under single operating condition was validated. The test results indicate that the dynamic stiffness characteristics of the rubber mount are depended on the excitation frequency and amplitude. There is a little relation between the lag angle and the excitation signal. However, the isolation ability of the engine rubber mount becomes badly when it is excited by higher than 60Hz signal with small amplitude.

关 键 词：发动机 隔振 橡胶悬置 试验 建模 

分 类 号：TH113[机械工程—机械设计及理论] U464[机械工程—车辆工程]