计及损耗的超磁致伸缩材料参数提取及有限元仿真应用  

Parameter Extraction and FEM Simulation of Giant Magnetostrictive Transducer Considering Losses

作　　者：韦艳飞 杨鑫[1] 陈钰凯 杨明智 姚锐 Wei Yanfei;Yang Xin;Chen Yukai;Yang Mingzhi;Yao Rui(National Engineering Research Center for Power Conversion and Control,Hunan University,Changsha,410082,China;Hunan Aerospace Magnetoelectric Co.Ltd,Changsha,410219,China)

机构地区：[1]国家电能变换与控制工程技术研究中心(湖南大学),长沙410082 [2]湖南省航天磁电有限责任公司,长沙410219

出　　处：《电工技术学报》2022年第7期1726-1734,共9页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金重点资助项目(51837005)。

摘　　要：有限元法(FEM)是换能器设计的重要手段。超磁致伸缩换能器的核心振子——超磁致伸缩材料在应用中存在电磁损耗、机械损耗和磁机耦合损耗等。而现有的有限元仿真软件中的磁致伸缩模块无法对超磁致伸缩换能器进行多场耦合下的损耗的准确计算,且难以获取不同工况下的材料参数,给换能器的设计造成了较大的误差。因此相比压电模块,有限元仿真中的磁致伸缩模块仍未得到广泛应用。该文通过对压电和磁致伸缩的机电耦合的有限元控制方程的数值比拟,利用压电模块实现了对超磁致伸缩换能器的有限元仿真,并利用材料复参数对损耗进行表征,实现了超磁致伸缩换能器计及损耗的有限元仿真。为得到超磁致伸缩材料的特性参数,利用平面波法(PWM)对磁-机耦合特性参数测试平台进行阻抗建模分析,通过粒子群算法提取不同预应力下考虑损耗的特性材料参数,并将所得参数代入有限元仿真软件COMSOLMultiphysics中进行谐响应分析,所得结果与PWM模型结果及实验阻抗曲线吻合良好,证明了所提方法的可行性和准确性。Finite element method(FEM)is an important means for transducer design.As the core of the giant magnetostrictive transducer,giant magnetostrictive rods generate electromagnetic losses,mechanical losses and magnetic coupling losses in operation.The magnetostrictive module in the existing FEM simulation software is unable to calculate the losses of the giant magnetostrictive transducer under multi-field coupling,and what’s more,the parameters of the giant magnetostrictive material under different working conditions are unavailable,which causes huge errors in transducer design.Therefore,compared with the piezoelectric module,magnetostrictive module in FEM software is still not widely used.In this paper,by comparing the FEM governing equations of piezoelectric electromechanical coupling and magnetostrictive electromechanical coupling,the FEM simulation of giant magnetostrictive transducer is realized by using the piezoelectric module,and losses are considered by using complex quantities of material parameters.For characteristic parameters of giant magnetostrictive material,the plane wave method(PWM)is applied on the test platform of magneto-mechanical coupling characteristics for impedance modeling analysis,material parameters are extracted through the particle swarm algorithm under different pre-stress conditions,and these parameters are used in COMSOL Multiphysics for harmonic response analysis.The results obtained are in good agreement with those obtained in experiments and PWM model,which proves the feasibility and accuracy of the proposed method.

关 键 词：材料复参数 损耗 阻抗建模 粒子群算法 有限元法 

分 类 号：TM271[一般工业技术—材料科学与工程] TM134[电气工程—电工理论与新技术]