Employing the virtual displacement principle and considering constraint conditions of material interface, the stiffness matrix and equivalent load vector for this element are established.
应用虚位移原理和结合考虑材料交界面上的约束条件，文章建立了接触单元的刚度矩阵和等效荷载向量。
The stiffness matrix, equivalent nodal load and consistent mass matrix are derived for the beam element with variable cross-section.
导出了变截面梁单元的单元刚度矩阵、单元等效节点荷载和单元一致质量矩阵。
A nonuniform beam finite element is presented and the element stiffness matrix and equivalent joint load are derived to analyse nonuniform members used increasingly in engineering structures.
针对工程结构中广泛应用的变截面构件，提出了一个变截面平面梁单元，推导了其单元刚度矩阵和等效节点荷载公式。
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