Abstract:

Powertrain torsional vibration has become a subject of increasing concern for the vehicle of parallel-engine.A computer simulation is an effective tool in analyzing this problem to economize time and money for project development.The natural frequencies are got from the CAE model firstly.Then nonlinear coulomb clutch damping is approximated by using an equivalent viscous damping value,and the model can be tuned with test data to get frequency response accurately.Finally,some problems are predicted from the analysis results and some suggestions are made.The analysis method is developed in other domains.

摘要：

 随着国内汽车企业对车辆质量要求的升级，噪声振动的控制技术备受重视，来自系统设计相关的噪声振动需要靠实车测试及计算机模拟的配合来解决。动力传动系统的扭转共振就是一个这样的噪声振动问题，利用系统化步骤解决这个问题的优点是它适用于各种类型的车辆，仿真模拟是解决这个问题的核心技术。首先根据发动机到车桥整个动力系各单元部件的转动惯量、扭转刚度及阻尼来建振动力学模型，然后分析系统的自然频率、模态及频响，进行数模的开发过程与测试对比，这种方法对车辆性能优化问题非常有效。

关键词: 振动与波, 扭转振动, 动力传动系统, 频率, 频响, 阻尼