车门玻璃下位振动传递路径建模及优化分析

Transfer Path Modeling for Door Glass Vibration and Optimization Analysis

阐述了传递路径分析(transfer path analysis,简称TPA)方法的基本理论,对某车型左前车门玻璃下位关门过程中玻璃振动异常进行了传递路径分析,并针对该车门结构设计特点,提出了基于传递路径分析方法的二级TPA分析模型,分别为锁机、密封条⁃玻璃一级传递路径模型和导轨接附点⁃玻璃二级传递路径模型。通过常用关门速度(1.5 m/s)获得各测点的工况响应,利用建立的二级TPA模型和工况响应计算获得工况载荷和路径贡献量,准确定位引起车门玻璃下位振动水平较大的原因,提出改进方案,大幅降低了其振动水平。

The transfer path analysis(TPA)of the abnormal vibration guides to a two-level TPA model of a closing door's glass-the lock,weather-strip and glass at the first level and the rail junction and glass at the sec⁃ond.Based on the model,the operating load and path contribution,which determine the causes of the abnormal vibration,derive from the response of the testing points when the door is closed at 1.5 m/s(the speed at normal situations).An improved scheme considering the reasons reduce the abnormal vibration of the door glass.