首先，根据汽车动力传动系统的扭振当量原则与方法，分别建立了怠速工况与正常行驶工况下发动机、双质量飞轮以及传动系统的无阻尼多自由度扭振当量模型。

First of all, the two undamped multi-freedom torsional vibration models of DMF under idling and driving condition are built based on the principles of vehicle power train equivalent torsional model.

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首先，根据汽车动力传动系统的扭振当量原则与方法，分别建立了怠速工况与正常行驶工况下发动机、双质量飞轮以及传动系统的无阻尼多自由度扭振当量模型。

First of all, the two undamped multi-freedom torsional vibration models of DMF under idling and driving condition are built based on the principles of vehicle power train equivalent torsional model.

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