通过位移形函数假设，采用伽辽金积分方法得到了时间变率的动力学控制方程；
By supposing the displacement shape functions and applying the Galerkin method, the dynamical equations with respect to time were gained.
在有限单元法中，形函数用于描述单元内位移分布，决定着单元的特性。
Shape function used for describing displacement distribution in element determines the speciality of the element in the finite element methods.
利用几何非线性的应变-位移关系式，在小变形假设条件下确定了单元耦合形函数。
The element coupling shape function matrices are derived by means of geometrically nonlinear strain displacement relation under small deformation assumption.
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