And the corresponding thin-walled element stiffness equation was formulated. The apparent formulation of element stiffness matrix under the local coordination was attained.
并建立了相应的薄壁单元刚度方程，从而得出了局部坐标系下单元刚度矩阵的显式。
The precise tangent stiffness matrix of space cable element is derived in this paper by using equilibrium equation.
本文采用状态平衡方程推导出用超越函数表示的空间索单元切线刚度矩阵的精确表达式。
By using the moment-curvature relationships of the member section, the inelastic element stiffness matrix is derived directly from the slope-deflection equation of clastic member.
利用杆件截面的弯矩—曲率关系，可以直接由弹性杆件的转角—位移方程建立单元的非线性刚度矩阵。
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