基于经典的层合板理论及板的大挠度基本假设，得到四边简支层合板的非线性运动方程及变形协调方程；
On the basis of classical lamination theory and large deflection hypotheses of plate, the equilibrium and compatibility equations of simply supported composite laminated plates were obtained.
并以桩土应力比为纽带分析桩与桩间土体中应力应变的关系，确定桩体复合地基的竖向变形协调方程，介绍了复合地基的变形与稳定性分析方法。
Analyzed the stress-strain relation of pile and soil by the stress ratio, deduced the vertical deformation and harmony equation, introduced the analysis means of deformation and stabilization.
考虑到索穹顶结构属于动不定结构体系，文中还对动不定体系的求解过程进行了详细的推导，同时采用建立在大变形基础上的变形协调方程来求解结构体系的有限机构位移。
As the cable dome is a kinematically indeterminate system, its solving process is also derived in detail and the equations, which are based on large distortion, are adopted to solve the problem.
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