The equivalent circuit of ultrasonic coupling vibration of a longitudinally-excited short column

摘要

On the basis of apparent elasticity method,we derived the equiva-lent circuit of coupling vibration of a short column and discussed its frequencyequation and the effects of the load impedance on the resonant frequency of theshort column.By the equivalent circuit,we calculated the input mechanicalimpedance of the longitudinally-excited short column and the curves of the ap-parent vibration velocity ratio versus the geometrical dimensions of the column.It shows that the equivalent circuit method is a simple and convenient one toanalyze and calculate the coupling vibration of the short column.