【作者】 陈海燕； 杨庆新； 刘素贞； 闫荣格； 杨文荣； 颜威利；

【Author】 Chen Haiyan, Yang Qingxin, Liu Suzhen, Yan Rongge, Yang Wenrong, Yan Weili (Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei University of Technology, Tianjin 300130, China)

【机构】 河北工业大学电磁场与电器可靠性省部共建重点实验室；

【摘要】 建立超磁致伸缩薄膜的磁-机械特性模型对于指导器件的设计、仿真具有重要意义。对弱耦合模型和强耦合模型的耦合机理进行了分析比较,考虑了杨氏模量以及磁导率随磁场的变化,对已有强耦合模型进行了有效的改进。薄膜尺寸非常小,用有限元方法进行单元剖分时会产生严重的网格变形,降低计算精度,因此选用无单元Galerkin方法有效地解决了这一问题。对两种模型的数值计算结果和实验值进行了比较,证明强耦合模型的优势,验证了改进后的模型在计算精度上的提高。更多还原

【Abstract】 Applications of giant magnetostrictive thin films in micro-electro-mechanical systems require an important numerical simulation step to investigate their suitability. For this reason, models devoted to the simulation of giant magnetostrictive in thin films are developed. The weak and strong coupling models are compared. Considering the change of Young’s modulus with magnetic field strength and change of the rela- tive permeability, an improved strong coupling model is proposed. With the finite element method (FEM), the distortion of the elements will decrease precision, so element free galerkin method (EFGM) is used to solve this problem. At last, the results are compared with the experimental data to prove the correctness of the models and validate the performance of EFGM.更多还原