考虑温变时超磁致伸缩微致动器的动力学分析  

Dynamic Analysis of a Giant Magnetostrictive Actuator at Varying Temperature

作　　者：袁惠群[1] 吴文波[1] 李莹[1] 李东[1] 

机构地区：[1]东北大学理学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2011年第4期549-553,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(10772043);教育部高等学校博士学科点专项科研基金资助项目(20090042110003);沈阳市重点技术创新计划项目(2008-005-B)

摘　　要：建立了考虑温度变化时的超磁致伸缩微致动器的动态振动微分方程,得到了微致动器振动响应的非共振解析解.在已知磁化强度情况下,讨论了温度和预应力对振动响应的影响,并得到了位移响应随温度变化的系数;解出由于超磁致伸缩材料非线性而产生的亚谐共振解,讨论了温度对共振因子的影响.仿真结果表明,超磁致伸缩材料的磁-力-热耦合非线性对微致动器的振动响应有明显影响,在分析与设计微致动器时需要考虑温度的影响.A simple dynamic model was established to determine the effect of temperature on vibratory response of the giant magnetostrictive actuator,resulting in a differential equation of motion containing terms of temperature.Under known magnetization intensity,the effect of temperature and pre-stress on vibratory response was discussed,and a coefficient of temperature dependent displacement response determined.The resonance solution caused by giant magnetostrictive nonlinearity was derived,and the effect of temperature on resonance factors discussed.Simulation results indicated that magneto-thermo-mechanical coupled nonlinearity greatly affected vibratory response of the actuator,and that temperature should be considered in analysis and design of the actuator.

关 键 词：超磁致伸缩微致动器 磁-力-热耦合非线性 动力学分析 振动响应 温度影响 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]