The governing equations of the raft are obtained based on the thin plate theory and the virtual work principle.
筏板的控制方程由薄板理论和虚位移原理得到。
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。
The determination of freedom less than the actual one may be find implicit constraint properly on the basic of the given one in using the virtual work principle to solve the problems.
由虚功原理解题时可在题中给定约束的基础上，适当考虑隐含约束，确定比实际少的自由度。
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