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首先，导出了用极坐标系描述的中厚板自由振动板的微分方程，用分离变量法求得其一般解。
Firstly, the expressions of free vibration of moderately thick plates in polar coordinates are derived and the general solutions are obtained by the means of method of separation of variables.
本文以工程常见四端位移为零的振动板为例，提出一种新的压电式传感器的设计方法测量体积位移。
With a shown example of the pinned-pinned plate, a new piezoelectric sensor design is presented to measure volume displacement.
基于有限元直接法计算振动板的频率响应，以板局部厚度为设计变量，计算了振动速度对局部板厚度的灵敏度；
Its frequency response is calculated by use of FEM and its vibration velocity sensitivity with respect to its local thickness as a design variable is computed.
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