本文建立了一个梁单元位移算子的新概念，并提供一种梁平面弯曲变形的梁单元位移算子求变形的计算方法。
A new concept on the displacement operator for beam unit is established, and a method of calculating the deflection Angle of beam unit is then provided.
基于修正的拉格朗日坐标描述法，推导了空间纤绳单元的大位移刚度矩阵。
In this paper, the lap displacement stiffness matrix of the space cable is derived bac on the updated Total Lagrangian Formulation.
文末的算例表明，仅用很少的单元，位移和应力即可获得较高的精度。
The numerical examples given at the end of this paper indicated that the displacements and stresses have high precision by few elements.
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