就一个三质量的具有非线性弹性轴系统的自由扭转振动特性进行了探讨。

This paper deals with the free torsional vibration characteristics of non-linear elastic shaft with multi-degree of freedom.

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分析结果表明：操纵系统对旋翼桨叶扭转振动固有特性的影响是一个值得注意的问题。

The results obtained by these analyses show that the problem of the influence of control system on modal characteristics of the rotor blades torsional vibration is noticeable.

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矩形截面的平面曲梁理论探索的弯曲和扭转耦合振动特性。

The plane curved beam theory with rectangular section is employed to explore the bending and twisting coupling vibration characteristics.

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