Characteristic equation of a rectangular plate is derived based on its potential energy functional.
基于矩形板的势能泛函导出其特征方程。
As an example, the frequency and its vibration mode of a rectangular plate with four edges free have been solved.
以四边自由矩形板为例求解了板的频率及其振型。
Meanwhile, the bending of a rectangular plate with complicated boundary conditions is calculated by the principle of minimum potential energy with mixed variables.
同时，应用混合变量的最小势能原理于计算一复杂边界条件矩形板的弯曲。
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