The concept of extended boundary node was presented. By using finite difference method, the solution of the gained difference equations was given and simulated by computer.

由此提出了扩展边界节点的概念，并使用有限差分法，对所得到的差分方程组进行了计算机求解及模拟。

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This paper focuses on developing a new high precision finite element method by combining ordinary linear element and mobile node.

着重于开发一种以常规线性单元为基底，附加中间移动节点而构成的新型高精度的复合有限单元方法。

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Normal modes in the pole and important characteristic parameters such as resonance frequency and position of the displacement node are obtained using the finite element method.

并应用有限元法对变幅杆进行了模态分析，得到了共振频率和位移节点等重要参数。

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