从卷积型变分原理的泛函出发，通过分析泛函中的各项，推导出求解动力响应问题的时-空有限元法，并将其应用于梁的动力问题中。
Based on Gurtin type variational principle a finite element method for initial value problems is presented by functional analysis. It is used for problems of beams dynamics.
本文是关于非线性响应理论的文章的前半部分。由闭路格林函数的生成泛函的展开式及闭路格林函数的变换关系导出非线性响应的一般表示式。
By using the generating functional and the transformations for different forms of the closed time path Green's functions, the general equations on nonlinear response are derived.
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