复合振动系统中“局部扭转共振”现象的研究  

The Research of Part-Torsion Resonance in Complex Vibration System

作　　者：刘世清[1] 丁大成[1] 董彦武[1] 

机构地区：[1]中南工学院基础课部,陕西师范大学

出　　处：《中南工学院学报》1995年第1期1-6,共6页

摘　　要：本文从扭转振动波动方程出发，推导出了具有“类圆锥”过渡段的复合阶梯型扭转变幅杆的频率方程和放大倍数的解析表达式．从实验和理论上对该复合变幅杆的谐振频率随细端长度和直径的变化进行了测量和计算．通过对比，首次证明了复合振动系统中“局部”扭转共振现象的存在，并给出了其产生条件．This paper discusses the phenomenon of part-torsion resonance. Starting with the torsion vibration wave-equation. It deduces the frequency equation and amplification ratio of the complex stepped torsional-mode concentrator with a circular cone-like. Then it probes Into the relations between the harmonic frequency of the complex system as well as the length of the slender rod. Through contrast of the theory with experiment, the generating condition of the part-torsion resonance is obtained.

关 键 词：扭转共振 局部共振 超声振动系统 

分 类 号：O422.6[理学—声学] O55[理学—物理]