中文摘要：

本文利用车辆动力传动系统扭转强迫振动集中参数模型,采用直接导数法推导了扭振角位移和轴段附加扭振应力对轴系刚度的灵敏度计算公式,扩展了扭转强迫振动响应的灵敏度分析方法。以某车辆动力传动系统为实例进行灵敏度计算和分析,说明了该方法的可行性,为系统动力学修改和优化设计提供了理论依据。

英文摘要：

Based on the lumped parameter model of forced torsional vibration of powertrain,the sensitivity formulations of the torsional vibration angualr displacement of lumped masses and additional torsional vibration stress of shafts to stiffness were derived by the direct differentiation method.The sensitivity analysis of forced torsional vibration response was extended.With the powertrain of a heavy vehicle as a real example,the characteristics of sensitivities of vibration response on powertrain were calculated and analyzed.The feasibility of this method was validated.It provides the theoretical foundation for dynamic modification and optimization design of powertrain.