The orientation of disturbance factor vector is the same as that of vector of material unit stress.
扰动因子向量的方向与材料单元体应力主方向相同。
In the process of measuring radio frequency absorb material by vector network analyzer, the impedance of rectanglecoaxial measuring device is mismatched and cause redundant reflection.
在使用矢量网络分析仪对射频吸波材料进行测试的过程中，由于矩形同轴装置阻抗不匹配，将引起不希望有的反射。
Employing the virtual displacement principle and considering constraint conditions of material interface, the stiffness matrix and equivalent load vector for this element are established.
应用虚位移原理和结合考虑材料交界面上的约束条件，文章建立了接触单元的刚度矩阵和等效荷载向量。
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