Terfenol棒抑制涡流的有效方式及其有限元设计  

Finite Element Design about Feasible Ways to Minimize the Eddy Current Losses in Terfenol Rod

作　　者：滕舵[1] 陈航[1] 朱宁[1] 

机构地区：[1]西北工业大学航海学院,陕西西安710072

出　　处：《电声技术》2010年第10期35-38,共4页Audio Engineering

基　　金：高等学校博士学科点专项科研基金(20070699018;20096102120012)

摘　　要：从描述电磁场宏观性质的Maxwell方程着手,借助于电磁位对(A,V-A),应用有限元技术,对Terfenol棒几种不同开槽方式抑制涡流损耗的情况进行了分析,结果说明,这种三维涡流有限元技术,可很好地预测Terfenol棒内的涡流分布,仿真结果为Terfenol棒抑制涡流的狭缝切割方式提供了强有力的依据,从而避免了对这种昂贵材料切割的盲目操作。对比3种不同结构的Terfenol棒涡流有限元分析结果,可知提出的梳妆开槽狭缝切割结构在抑制涡流损耗上的效果是显著的。Terfenol rod, which is an efficient functional material, widely exists in electroacoustic transducers. However, how to reduce their eddy current losses is always an inevitable key step during their design Associated with the electric/ magnetic potential pair（A, V-A）, a finite element method to evaluate eddy current losses has been obtained from the Maxwell＇s equations, which can govern the macro electromagnetic fields. Here, some computer simulations to describe the eddy current losses in Terfenol rods, which are slotted in different ways, have been finish. The resuh shows that the 3D finite element analysis technique can predict the distribution of the eddy current in Terfenol rod very well, and the analysis can provide a guide of slotting the Terfenol rod to reduce the eddy current losses. A comparison about three simulations shows that the pectinate slotting in Terfenol rod is an effective way to minimize the eddy current losses.

关 键 词：Terfenol棒 超磁致伸缩 换能器 涡流损耗 有限元 

分 类 号：TB565[交通运输工程—水声工程] TM153[理学—物理]