单元的刚度矩阵和几何刚度矩阵全部显式给出。
The element siiffness matrix and the geometric stiffness matrix etc. are explicitly presented.
其中几何刚度矩阵由轴向力、双向弯曲和截面翘曲的影响组成。
The geometric stiffness matrix is composed by the effect of axial force, bending moment and bimoment.
在建立拱的振动传递方程时，考虑了拱内的轴向变形和几何刚度。
The geometric stiffness and the axial deformation of arch are considered in formulating its vibration transfer equation.
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