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。
The stiffness matrix, equivalent nodal load and consistent mass matrix are derived for the beam element with variable cross-section.
该法将虚位移原理推广应用于有限单元的节点，从而得到用以描述局部电磁力分布的等效节点力。
The distribution of local magnetic force is described with an equivalent node force, which is derived from an extended application of virtual work principle to FEM node.
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。
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.
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