钢绞线用磁致伸缩传感器偏置磁场的有限元分析  

Research on Finite Element Simulation in Bias Magnetic Field of the Magnetostrictive Sensor Used for Steel Strands

作　　者：刘增华[1] 张易农[1] 吴斌[1] 刘溯[1] 何存富[1] 

机构地区：[1]北京工业大学机械工程与应用电子技术学院,北京100124

出　　处：《应用基础与工程科学学报》2009年第2期281-289,共9页Journal of Basic Science and Engineering

基　　金：国家自然科学基金项目(10602004);北京市自然科学基金项目(2072003);北京市优秀人才培养资助项目(20081B0501500173);北京工业大学博士科研启动项目(52001013200701)

摘　　要：首先对利用磁致伸缩效应在钢绞线中产生纵向模态的方法进行了理论分析.利用Maxwell三维磁场有限元分析软件对99mm长,公称直径17.80mm的7芯钢铰线建立模型.并依照磁路设计的相关理论,设计了利用双磁路及三磁路为7芯钢绞线提供偏置磁场的方案.最后,通过对磁路中的每根钢丝表面及中截面磁感应强度的比较分析,证明三磁路比双磁路的磁场强度更大,均匀性更好.The method how to excite the longitudinal modes in the steel strands based on magnetostrictive effect is analyzed theoretically. The simulation model which is a seven-wire steel strand with 99mm long, 17.80mm nominal diameter is constructed by software Maxwell which is used for 3D electromagnetic field finite element analysis. According to corresponding theory of designing magnetic circuit, double magnetic circuits and three magnetic circuits are developed to provide bias magnetic for seven-wire steel strands. Magnetic circuit of surface and radial sections of steel strand is finite element analyzed. The results show that three magnetic circuits have not only stronger but also have better uniformity in magnetic field intensity.

关 键 词：磁致伸缩效应 有限元 钢绞线 超声导波 

分 类 号：TB552[理学—物理] TB132[理学—声学]