The theory of virtual work principles of deformable bodies and the technique to derive their expressions are studied and applied to contact problems to build FEM formulas.
研究了变形体虚功原理的理论和建立方法，并将其用于建立接触问题有限元法计算公式。
Based on the virtual work principle and thin plate theory, the mechanical performance of the moving paper under gravity was analyzed by nonlinear FEM.
根据虚功原理和薄板度理论，对纸张在自重作用下的静动力学特性作了非线性有限单元法数值建模。
This paper puts forward the principle of complementary virtual work in the finite displacement theory of elasticity and provides a detailed proof thereof.
本文建立了有限变形弹性理论中的余虚功原理，包括此原理的提出与详细的证明。
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