self-vibration main cycle 自振主周期
self-vibration cycle
自振周期
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The conceptions of balance point, limited cycle and their stability are introduced as the basis of the author's discussion on the properties and mechanism of self-excited vibration.
引入平衡点、极限环及其稳定性的概念，以此为基础我们讨论自激振动的特点和机制。
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