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。
Then theoretical resonance length, small end diameter, displacement node, magnification factor, shape factor and other parameters of the amplitude amplifier pole could be determined.
确定出其理论共振长度、小端直径、位移节点、放大系数、形状因数等参数。
By this equation, we can calculate the displacement, load and dynamometer diagram at every rod node and any time.
通过求解该方程，可计算各节点不同时刻的位移，计算出载荷，绘出各节点功图。
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