Why is natural frequency important in vibration analysis?
在振动分析中，为什么自然（固有）频率很重要？
A system oscillating at its natural frequency is said to resonate.
系统以其固有频率振动又叫共振。
The swing is a pendulum with a single natural frequency depending on its length.
秋千是只有一个固有频率的摆，此频率决定于它的长度。
In dynamic analysis, the natural frequency is given from the first mode to fifth mode.
在动态分析中，计算出了塔架前五阶固有频率。
At first the method for calculating the fundamental natural frequency of structure is researched.
首先研究了结构的最低阶固有频率的计算方法。
At first the method for calculating the fundamental natural frequency of structure is researched.
首先研究了结构的最低阶固有频率的计算方法。
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