摘要
针对铁磁性材料中磁致伸缩导波的产生机理,利用有限元软件创建了非线性力磁耦合磁致伸缩有限元模型,分析了非线性铁磁性在外加磁场作用下磁致伸缩力的产生,以及在该力作用下材料中质点的位移情况,实现了基于铁磁性材料非线性力磁耦合本构关系的磁致伸缩导波的产生及传播过程仿真研究.仿真结果表明,当铁磁性管道在由永磁体产生的偏置磁场及通过高频交流电流线圈所产生磁场的共同作用下,管道内质点将受到平行于磁场方向的磁致伸缩力的作用并产生高频振动形成磁致伸缩导波,通过对各质点位移情况分析可以清楚了解到导波的传播及接收过程,并通过实验验证了该仿真研究的可靠性.
In light of the mechanism of guided wave based on the magnetostriction,a finite element model of magneto-mechanical nonlinear coupling is set up.The magnetostrictive force and the displacement of particle are analyzed.The generation and propagation processes of the longitudinal based on the magnetostriction is simulated.The results show that,by the bias magnetic and high frequency ac magnetic field,the magnetostrictive force which parallel with the magnet is imposed on the particle and the guided wave is formed.Using the displacement of particle the propagation and receive processes of guided wave is clearly displayed.Furthermore,the simulation is verified by the experiments successfully.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2014年第4期548-551,570,共5页
Engineering Journal of Wuhan University
基金
国家自然科学基金项目(编号:50875077)
湖北省优秀中青年科技创新团队计划项目(编号:T201105)
教育部科学技术重点研究项目(编号:211110)
关键词
有限元仿真
磁致伸缩传感器
导波
磁致伸缩效应
finite element simulation
guided wave
magnetostrictive sensor
magnetostriction effect
