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超磁致伸缩激振器的结构优化及动态性能研究 预览

Structural optimization and dynamic performance of a giant magnetostrictive vibration exciter
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摘要 超磁致伸缩激振器的结构决定其动态性能。为了提高激振器的动态性能,其驱动线圈采用减少匝数、增加线径、大电流驱动的设计方案。采用叠片式GMM棒,计算了它的几何参数,并选取了最佳的预压应力和磁场强度;设计驱动线圈时考虑了温度的影响,优化了它的几何尺寸和磁路设计,驱动磁场由方波信号叠加直流分量产生;建立了激振器的数学模型,用MATLAB进行了仿真,分析了其阶跃响应。实验表明,激振器的动态性能显著提高,应用效果到达了振动时效的要求。研究结果为超磁致伸缩激振器的结构优化与设计提供参考依据,具有重要的工程应用价值。 The dynamic performance of a giant magnetostrictivevibration exciter depends upon its structure.Here,in order to improve its dynamic performance,its driving coil’s design scheme ofreducing turn number,increasing wire diameter and large currentdriving was adopted.Laminated GMM rod was adopted and its geometric parameters were calculated,and the optimal pre-compression stress and magnetic field intensity were selected.Effects of temperature were considered during designing the driving coil,and its geometric size and magnetic circuit design were optimized.The driving magnetic field was generated through superimposinga square wave signaland a DC component.The mathematical model of the vibration exciter was established,and simulated with MATLAB.Its step response was analyzed.Test results showed that the dynamic performance of the vibration exciter is obviously improved and its application effect can meet the requirements of vibration ageing;the results can provide a basis for structural optimization and design of giant magnetostrictive vibration exciters,so they are valuable for engineering application.
作者 王安明 孟建军 胥如迅 何昌雪 WANG Anming;MENG Jianjun;XU Ruxun;HE Changxue(School of Mechanical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Mechanical T&R Institute,Lanzhou Jiaotong University,Lanzhou 730070,China;Engineering Technology Center for Information of Logistics&Transport Equipment,Lanzhou 730070,China;School of Traction Power,Xi’an Railway Vocational&Technical Institute,Xi’an 710026,China)
出处 《振动与冲击》 EI CSCD 北大核心 2019年第17期184-190,共7页 Journal of Vibration and Shock
基金 国家自然科学基金(61563027)。
关键词 超磁致伸缩材料 激振器 结构优化 阶跃响应 幅频特性 giant magnetostrictive material vibration exciter structural optimization step response amplitude frequency characteristics
作者简介 第一作者:王安明,男,博士生,讲师,1969年生;通信作者:孟建军,男,博士,教授,1966年生。
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