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。
The main difficulty is to find a test method with simple specimen shape and loading style to cause different interface stress modes, that is, normal stress and shear stress dominated modes.
测量界面强度的主要困难在于寻求一种便于试验的试件形状和加载方式，使得界面上能够产生不同的应力状态，即在不同的剥离应力和剪应力比的状态下发生破坏。
The main difficulty is to find a test method with simple specimen shape and loading style to cause different interface stress modes, that is, normal stress and shear stress dominated modes.
测量界面强度的主要困难在于寻求一种便于试验的试件形状和加载方式，使得界面上能够产生不同的应力状态，即在不同的剥离应力和剪应力比的状态下发生破坏。
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