位移响应功率谱表明响应的共振分量是显著的，对某些节点甚至比背景分量更加重要。
The spectra of displacement response indicate that the resonant component of the response is significant, and even more so than the background component for some nodes.
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。
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.
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。
Then theoretical resonance length, small end diameter, displacement node, magnification factor, shape factor and other parameters of the amplitude amplifier pole could be determined.
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