针对实际传动系统的灵敏度分析与动力学修改

Sensitivity Analysis and Dynamic Modification Based on the Physics Modelof Vehicular Powertrain

应用系统矩阵法,推导了扭转振动固有特性的灵敏度公式;应用转换矩阵,针对实际传动系统,分析了固有频率和振型对轴系刚度、惯量、传动比等实际系统模型参数的灵敏度;基于灵敏度分析,采用多步灵敏度计算方法进行动力学修改;以某车辆动力传动系统为实例,验证了该方法在设计中的实用性。

By using the direct derivation method, the natural characteristics＇ sensitivities with respect to the undamped equivalent model parameters were derived. Then, by using the transfer matrix, the sensitivities turned to face the physical model, which was more practical to tell ones in the physical model where was the most sensitive position and what was the most parameter. The parameters included stiffness, inertia and especially ratio of the vehicle powertrain. Based on the sensitivity analysis, a multi--step method for dynamic modification was presented here. It is instanced to he effective by a certain powertrain.