径向复合功率合成超声振动系统  

Study on a new type of radial composite power synthetic ultrasonic vibration system

作　　者：刘世清[1] 王家涛[1] 苏超[1] 朱天宇[1] 王娉婷[1] 董飞[1] 

机构地区：[1]浙江师范大学应用声学研究所,浙江金华321004

出　　处：《浙江师范大学学报（自然科学版）》2012年第1期41-46,共6页Journal of Zhejiang Normal University:Natural Sciences

基　　金：国家自然科学基金资助项目(11074222);浙江省新苗人才计划项目(2011R404020)

摘　　要：对径向复合功率合成超声振动系统进行了研究.该系统由纵向超声换能器与变厚度剖面圆盘径向耦合而成.基于机电类比原理,推导出系统的楔形剖面圆盘径向振动等效电路及其共振频率方程,并得出其位移振幅放大系数的表达式,给出其第1、第2阶径向共振模式下振幅放大系数与其半径比的关系;探讨了圆盘振子第1、第2阶径向共振频率随其半径比的变化关系.理论及有限元结果表明:圆盘的位移振幅放大系数存在一个极大值,其第2阶共振模式比基频具有更大的振幅放大系数.对合成系统的共振频率进行测试,结果表明,理论与实验结果吻合较好.The vibration performance of a new type of radial composite power synthetic ultrasonic vibration system was studied.The system consisted of logitudinal ultrasonic transducer and a variable thickness circular ring which were combined in the radial direction.Based on the electromechanical analogy,the radial vibration equivalent circuit and the frequency equation of the wedge-shaped profile circular disc were derived.The radial amplitude magnification of the disc was given.The relationship between the radial amplitude magnification and radius ratio of the disc at the first and second order vibrational mode was obtained.The relationship between the first and second order radial resonance frequencies and the radius ratio of the disc was analyzed.The theoretical and Finite Element Method（FEM） simulation results showed that the amplitude magnification reached a maximum at a definite radius ratio of the disc vibrator,and the amplitude magnification of it at the second order vibrational mode was larger than that of the first order.By testing the resonance frequency of trial-made radial composite power synthesizer,it was showed that the theoretical resonance frequencies were in a good agreement with the measured results.

关 键 词：振动系统 功率合成 等效电路 频率方程 

分 类 号：TB55[理学—物理]