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A stochastic variational formulation for nonlinear dynamic analysis of structure

机译:结构非线性动力分析的随机变分公式

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摘要

In this paper, stochastic structural parameters and random dynamic excitation are introduced directly into the dynamic functional variational formulations. Based on the instantaneous minimum potential energy principle and the small parameter perturbation technique, a unified nonlinear stochastic variational formulation of dynamic analysis for random structure and the relevant incre- mental stochastic finite element method are also developed. With the aid of incremental recurrence equations, the transient nonlinear analysis of structures with stochastic parameters under random excitation may be obtained conveniently. The results of a numerical example show that the approaches presented in this paper have the advantages of simple and convenient program implementation, and are accurate and effective for the nonlinear dynamic analysis of random structures.
机译:在本文中,将随机结构参数和随机动态激励直接引入到动态功能变分公式中。基于瞬时最小势能原理和小参数摄动技术,还建立了统一的随机结构动力分析非线性随机变分公式,并提出了相应的增量随机有限元方法。借助增量递推方程,可以方便地获得随机激励作用下具有随机参数的结构的瞬态非线性分析。数值算例结果表明,本文提出的方法具有程序实现简单方便的优点,对于随机结构的非线性动力分析是准确有效的。

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