提出一种在转子上设置虚拟支承的方法，以保证弧齿锥齿轮的啮合稳定性，并采用传递矩阵法，建立了弧齿锥齿轮-转子系统的振动模型。

This paper presents a method of providing a virtual support for the rotor to assure the meshing stability of a pair of a pre determined spiral bevel gears in rotation.

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将系统振动模态分为耦合模态与弧立模态，由数组相互耦合的模态张成耦合模态子空间。

The vibration modes are divided into two classes:separated and coupled. The coupled-mode subspace is spanned by the groups of coupled modes.

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实验结果表明，附加超声振动能改善放电间隙状态，减少短路、拉弧现象，提高了材料的去除率。

Experimental results show that the discharging gap is improved and the frequency of short circuit is reduced when ultrasonic vibration is added.

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