文章摘要
贾杨,沈建中.带过渡段阶梯形变幅杆的有限元分析[J].声学技术,2006,(1):75~81
带过渡段阶梯形变幅杆的有限元分析
Finite element analysis of stepped ultrasonic horn with different transitional sections
投稿时间:2005-02-10  修订日期:2005-05-11
DOI:
中文关键词: 阶梯形变幅杆  过渡段  有限元方法  导波
英文关键词: stepped ultrasonic horn  transitional section  FEM  guided wave
基金项目:
作者单位
贾杨 中国科学院声学研究所, 北京, 100080 
沈建中 中国科学院声学研究所, 北京, 100080 
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中文摘要:
      对几组不同变幅比带不同过渡段的阶梯形变幅杆进行了有限元分析,获得了阶梯形变幅杆特性随过渡段形状和尺寸变化的一些规律。利用有限元软件ANSYS算出了每个变幅杆的纵振动模式谐振频率。并用其后处理功能得出了粗细端面的相对位移,由此计算振幅放大系数,得到的结果与已有的关于阶梯形变幅杆的理论以及实验结果符合得较好,计算出的谐振频率与实际测量值也较好地相符。文中还利用该软件计算了变幅杆粗细端分界面上的应力及其分布,数据表明过渡段可以显著改善粗细分界面上的应力集中。最后对导波理论和有限元分析方法的结果做了初步比较,两者亦符合较好。
英文摘要:
      A series of stepped ultrasonic horns with different transitional sections are analyzed with the finite element method.Rules on changes of frequency,amplitude amplification and distribution of stresses with different transitional section are found.Longitudinal vibration frequency and amplitude amplification of horns are computed by modal analysis with ANSYS.Theoretical and experimental results are in agreement.Stress distribution derived from post processing with ANSYS shows that transitional sections can remarkably reduce stress concentration on the interface between two rods of different diameters.The FEM results coincide with the theory of guided waves.
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