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。

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Based on the method of small parameters perturbation of 2nd order, the stochastic functional of potential energy for structures with stochastic stiffness under stochastic stimulus is derived.

利用小参数摄动法，建立了随机结构在随机激励下的二阶摄动随机势能泛函。

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