为解决某增程车型在怠速工况下的转向盘抖动问题，本文采用源—路径—响应分析思路，确定贡献量大的影响因素；通过动力总成系统参数优化、悬置安装点断开、转向系统扰动及排气系统断开等排查方法，确认双质量飞轮阻尼及后悬置动刚度为影响怠速充电工况转向盘振动的关键影响部件。方案优化后，怠速工况下转向盘三向振动RSS 由0.031g 降低至 0.017g 以下。转向盘主观评价实现振动无感，提升了整车 NVH 品质。

To address the problem of steering wheel shaking during idle operation of a certain extended-range vehicle model, the source-path-response analysis approach was adopted to identify the influential factors with significant contributions. Through optimization of powertrain system parameters, disconnection of suspension installation points, disturbance of the steering system, and disconnection of the exhaust system, etc., it was confirmed that the damping of the dual-mass flywheel and the dynamic stiffness of the rear suspension were the key components affecting the steering wheel vibration during idle charging operation. After the implementation of the optimization plan, the root mean square value (RSS) of the three-axis steering wheel vibration decreased from 0.031 g to below 0.017 g during idle operation. This achieved a non-perceptible vibration sensation in the steering wheel and improved the NVH quality of the entire vehicle.