And the virtual work and complementary virtual work principles for physical simulations are united theories of the energy principles for physical simulations.
而物理模拟虚功原理及余虚功原理是物理模拟能量原理的统一理论。
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。
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。
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