A set of difFerential equations and the corresponding boundary conditions are derived according to virtual work principle and the longitudinal displacement patterns.
根据所提出的位移模式，结合虚功原理推导出组合梁剪力滞效应微分方程以及相应的边界条件。
Based on the third order zigzag displacement model, a bending theory for laminated composite plates in an initially stressed state is derived by use of the principle of virtual work.
基于三阶折线位移模型，利用虚功原理导出了含初始平面应力的层合复合材料板的弯曲理论。
The principles of virtual work for deformable bodies can be obtained with facility by taking advantage of the well known principle of virtual displacement in analytical mechanics.
应用分析力学中质点系的虚位移原理，即可得到变形体的虚功原理。
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