本文利用变分有限元法、样条函数等，提出了薄壁箱梁结构分析的数值理论和方法。
This dissertation establishes numerical methods in structural analysis on the basic of variation principle, finite member element method, spline function, etc.
有限元法实质上是变分问题的一种数值解法，是物理问题的通用计算方法。
Essentially, the finite element method is a numerical technique for the variational problems, which is a general approach to physical problems.
推导了交变载荷下弹塑性随机有限元法迭代格式。
The iterative formulas of elastoplastic stochastic finite element method under cyclic loading were deduced.
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