超磁致伸缩超声换能器的结构与谐振频率分析  

Analysis of Structure and Resonance Frequency for Giant Magnetostrictive Supersonic Transducer

作　　者：黄文美[1] 王博文[1] 曹淑瑛[1] 闫荣格[1] 王绍亮[1] 

机构地区：[1]河北工业大学,天津300130

出　　处：《微特电机》2004年第9期5-8,共4页Small & Special Electrical Machines

基　　金：河北省自然科学基金资助项目 ( 5 0 3 0 5 5 );河北省重点科技攻关资助项目 ( 0 12 13 5 3 1D)

摘　　要：基于电路理论和系统动态方程提出了超磁致伸缩换能器的系统化整体结构设计方法。建立了超磁致伸缩超声换能器的有源元件Terfenol -D棒和各振动组件的机电等效电路 ,与电路理论相类比推导出谐振状态的频率方程 ,求解频率方程得出换能器各部分的结构尺寸。以这些尺寸为依据 ,用数值计算软件计算磁致伸缩棒中磁场分布情况。用有限元法建立了换能器的磁 -机械耦合动态方程 ,结合磁场分布情况 ,求解动态方程得出谐振频率 ,与给定谐振频率对比并校核原结构设计 。The systematic structural design of a giant magnetostrictive transducer based on the circuit theory and system dynamic equation has been proposed. The equivalent circuit of the transducer's vibrational components has been established and the frequency equations of resonance state and educing the dimensions of the transducer components has been gained.Based on these dimensions, the distribution of magnetic field in the Terfenol-D was calculated through software.Using finite element method,the magneto-mechanical coupled dynamic equation was founded and the resonance frequency was obtained. It has been found that the technology can be used to optimise the structure of a magnetostrictive transducer.

关 键 词：超磁致伸缩 换能器 等效电路法 有限元法 谐振频率 

分 类 号：TM35[电气工程—电机]