超磁致伸缩功率超声换能器振动系统分析

Analysis of Vibration System of Giant Magnetostrictive Ultrasonic Transducer

稀土超磁致伸缩材料(GMM)是近年来发展起来的一种新型功能材料,具有磁致伸缩应变大、磁机耦合系数高、响应速度快、能量密度高等优异特性,已在机电领域显示出良好的应用前景。介绍了超磁致伸缩功率超声换能器的结构以及工作原理,利用有限元方法建立了换能器的振动模型,并推导出换能器的谐振频率表达式,其数学模型与ANSYS仿真表明所建立的仿真模型可以反映出换能器结构与谐振频率之间的关系。结果表明该方法是可行的,开辟了求解磁致伸缩问题的新思路。

The construction and principle of giant magnetostrictive ultrasonic transducer were introduced,the mathematical model of the transducer was developed by using finite element method,and the resonance frequency of the transducer was obtained.The simulation results show the method is feasible.It gives a new way to solve the magnetostriction question.