大功率纵-弯超声振动系统的研究

Study on the high power longitudinal flexural vibrating system

本文研究了一种大功率纵－弯复合模式超声振动系统。该系统由两个纵向大功率夹心式压电超声换能器及一个均匀截面直棒组成。文中给出了该振动系统的具体结构及其共振频率设计方程。根据均匀直棒的纵向及弯曲振动理论，导出了振动系统中纵向及弯曲振动同频共振的条件。实验结果证明，该系统的测试频率与理论频率基本一致，并且系统中纵向及弯曲振动的共振频率测试值也基本一致，同时，其大功率辐射性能也较好。由于该系统由两个相同的换能器激发，且系统中纵向及弯曲振动的共振频率相同，因此，该系统的超声频激发电源只需一个。

A new type of longitudinal flexural vibrating system is studied The system consists of the sandwiched transducers and the bar with uniform cross section. The concrete construction and the frequency equation are given. The simultaneous resonance of the longitudinal and flexural vibrations is achieved. Experiments show that the measured frequencies are in good agreement with the calculated results, and the measured longitudinal frequencies are also in good agreement with the measured flexural frequencies. Therefore, the longitudinal and flexural vibrations can be excited by the same generator.