本文从非棱柱形梁的弯曲理论出发，推导出了变截面刚架元的单元刚度矩阵和等效结点载荷。
Based on the theory of the bending of non-prismatic beam, the paper has derived a rigidity matrix and the equivalent node load of the rigid-frame element with variable sections.
本文综述了线性及非线性弹性理论中的这种新型变分原理并就其在有限元中的应用作了讨论。
This paper gives a summary of the new variational principles in both linear and nonlinear theories of elasticity and presents some discussion on their applications to FEM.
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.
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