The parameters reflecting normal stiffness have more obvious effects on extensional vibration mode than those on flexuralmode and torsion mode.
结合面法向刚度大小的参数对纵向振动模态的影响比对弯曲、扭振模态的影响显著；
2
The results show that the dispersive wave excited by these two acoustic sources have strong contrast, which are Stoneley wave for monopole and flexural wave for dipole in the lowest mode.
These provide theoretical calculation basis for analysis of high modeflexural vibration of plate and design of big round plate and multi nodal compound flexural ultrasonic transducer.