圆柱圆锥复合型变幅杆的有限元分析  

Finite Element Analysis of the Cylinder-Cone Amplitude Transformer

作　　者：刘垚[1] 轧刚[2] 

机构地区：[1]山西大学工程学院,山西太原030013 [2]太原理工大学,山西太原030024

出　　处：《机械设计与制造》2013年第12期264-266,共3页Machinery Design & Manufacture

基　　金：山西省自然科学基金(2005-1051)

摘　　要：变幅杆是超声波加工中一个重要的组成部分,为了把变幅杆振幅放大和有效的把声能传递给负载,就需要对其进行动力学分析。但复合型变幅杆的截面变化复杂,传统的分析方法求解起来比较困难,甚至有些是无法求解的。通过采用有限元的分析方法,对复合型变幅杆进行模态分析找出在超声波发生器的激振频率范围内的共振频率。在此频率下对变幅杆输入端施加一个随时间按正弦规律变化的振幅,进行谐响应分析得出在输出端的振幅,从而得到变幅杆的放大比。并可求解出变幅杆在承受随时间按正弦规律变化的轴向载荷时的稳态响应,保证了变幅杆可靠有效的工作,从而提高了超声波加工效率。The amplitude transformer is an important part during the process of the ultrasonic machining. In order to enlarge the amplitude and transfer the acoustic energy to the load efficiently, it is necessary to adopt the dynamic analysis. Because the section change of the composite amplitude transformer is complex, it＇s diffwult to solve it by the traditional design method. It analyzes the cylinder-cone amplitude transformer by the finite element and gains the resonant frequeney under the range of ultrasonic excitation frequency in mode analysis. The input terminal of amplitude transformer is applied with the amplitude according to the experimental sine rule. Harmonic response analysis for the amplitude transformer is conducted and the amplitude of the output end of the amplitude transformer is obtained. Therefore, the amplification factor of the amplitude transformer is calculated. Finally the effective work of the amplitude transformer is guaranteed and the machining efficiency of the ultrasonic machining is increased.

关 键 词：超声波加工 有限元 变幅杆 稳态响应 

分 类 号：TH16[机械工程—机械制造及自动化] V261.92[航空宇航科学与技术—航空宇航制造工程]