Free Vibration and Natural Frequency;
自由震动和自然频率；
The free vibration of a free thick rectangular plate is analyzed.
对弹性地基上四边自由矩形厚板的自由振动进行了分析。
A new concept of "synthesis" of free vibration information is presented.
提出了自由振动信息综合的概念。
The analytic method for the free vibration of plane frame structure is presented.
介绍了一种平面杆系结构自由振动的解析解法。
In this paper, the space free vibration analysis model for track structure is established.
本文建立了轨道结构空间自由振动模型。
It is virtually vibration free and very quiet.
几乎是不可能的振动自由和非常安静。
Therefore, the use of aircraft noise in the production of small, vibration-free.
所以该机在生产过程中噪音小、无振动。
Therefore, the use of aircraft noise in the production of small, vibration-free.
所以该机在生产过程中噪音小、无振动。
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