车辆动力传动系固有特性灵敏度分析及动力学修改

Sensitivity Analysis and Dynamic Modification of Natural Characteristic in Vehicle Powertrain

分析了车辆动力传动系无阻尼自由振动固有特性的灵敏度 ,特别给出了固有频率和振型对轴系刚度及惯量等物理参数的灵敏度。基于固有特性灵敏度分析 ,给出了动力学修改的计算方法。并以某重型车辆动力传动系为实例计算并分析了其固有频率和振型的灵敏度问题 ,在此基础上进行了动力学修改。

The sensitivity of the narural frequency in non-damping free vibration of vehicle powertrain is analyzed.In particular,the sensitivities of natural frequency and vibration mode shape to physical parameters of shaft system like the stiffness and inertia of powertrain are given.A calculation method for dynamic modification is presented.With the powertrain of a heavy vehicle as a real example,the sensitivities of natural frequency and vibration mode shape are calculated and analyzed,based on which,the dynamic modification is also carried out.