Based on the equivalent elasticity method, the plane coupling vibration of a rectangular piezoelectric ceramic plate was studied and the resonant frequency equation was derived out.
利用等效弹性法分析了压电矩形共振器的二维耦合振动，导出了振子共振频率的解析表达式。
2
Through ground test, suitable parameters of the structural filter are selected and the coupling between the flight control system and the aircraft elasticity structure is effectively restrained.
通过试验，选择了合适的结构滤波器参数，有效地抑制了飞行控制系统与飞机弹性结构之间的耦合。
3
According to the hydromechanics and the elasticity theory established axial flow pump's fluid - solid coupling finite element equation.