超磁致伸缩激振器的结构优化及动态性能研究

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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。

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	王安明 1
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	孟建军 1
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	胥如迅 1
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	何昌雪 1

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

Abstract：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.

Key words： giant magnetostrictive material vibrator structure optimization step response amplitude frequency characteristics

收稿日期: 2018-04-25 出版日期: 2019-08-28

引用本文:

王安明 1,4,孟建军 1,2,3，胥如迅 1,2，何昌雪 1. 超磁致伸缩激振器的结构优化及动态性能研究[J]. 振动与冲击, 2019, 38(17): 184-190.
WANG Anming1,4,MENG Jianjun1,2,3,XU Ruxun1,2,HE Changxue1. Structural optimization and dynamic performance of a giant magnetostrictive vibration exciter. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(17): 184-190.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I17/184

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