作为实例，第一次导出了弹性振动系统最优时间的明显的表达式。
As a concrete example, the optimal time expression of the elastic vibration system has been derived for the first time.
通常，人们关心系统的弹性体模态，因为主要是由那些模态导致了我们遇到的所有噪声和振动问题。
Typically, people are concerned about the flexible modes of the system because those are the modes that generally cause all the noise and vibration problems that we encounter.
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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