带压电片的阶梯形变幅杆的几何尺寸对振动特性的影响  

INFLUENCE OF DIMENSION OF THE STEPPED HORNS WITH PIEZOELECTRIC TRANSDUCER ON THE PERFORMANCE OF THE VIBRATORS

作　　者：马玉英[1] 丁大成[1] 

机构地区：[1]陕西师范大学应用声学研究所

出　　处：《物理学报》1987年第2期208-216,共9页Acta Physica Sinica

摘　　要：本文分别讨论了两种振子:螺栓连接的振子和张力壳连接的振子。目的是:对螺栓连接的振子,通过改变阶梯形变幅杆的粗棒长度,分别研究细杆长度、位移振幅放大倍数,以及细杆输出位移振幅的变化,从而优选出变幅杆的粗端长度。另一方面对张力壳连接的振子,通过改变粗端直径大小,观察了细杆输出位移振幅的变化,粗、细端直径和谐振频率的关系。同时对细杆长度和谐振频率的关系,分别进行了探索,给出了选择振子尺寸的方法。In this paper, we discuss two types of vibrators, that connected by a single screw and that by a strain shell, respectively. The thick-end lengths of stepped horns are varied to find out their influence on the thin-end length, the gain of displacement amplitude, and the variation of displacement amplitude at the thin end. Optimized thick-end length are then selected out. For the vibrator connected by strain shell, the displacement amplitude of the thin end and the relationships among resonant frequencies and diameter of both the thick end and the thin end are determined. The relation between the thin-end length and resonant frequencies is also studied. The method for designing improved vibrators is given.

关 键 词：阶梯形变幅杆 应力振幅 振动特性 压电片 位移振幅 局部共振 放大倍数 振子 检流计 几何尺寸 

分 类 号：G6[文化科学—教育学]