不同稳态的磁弹簧特性分析与实验研究

针对传统金属弹簧在使用中易产生疲劳失效的问题,研究了一种利用磁铁之间相互作用力来产生抗力的新型弹簧——磁弹簧,通过磁弹簧压缩过程中压缩量与力变化关系的分析,发现了磁弹簧是一种变刚度弹簧.论文引入稳态的概念来分类不同类型的磁弹簧,建立了单稳态、双稳态磁弹簧典型结构的力学模型,采用仿真与实验相结合的方法分析了这两种类型磁弹簧的稳态情况和磁铁结构参数对稳态的影响.结果表明磁铁结构参数会影响到磁弹簧的稳态,增大两块磁铁的直径差或厚度差会改变磁弹簧的稳态.

Analysis and Experimental Research on Magnetic Springs with Different Stable States

Aiming at the problem that the traditional metal springs is liable to fail in service, a new type of spring-magnetic spring based on the interaction between magnets was studied, it was found that the magnetic spring is a variable-stiffness spring via the analysis of the relationship between the amount of compression and force. The concept of "stable state" was introduced to classify different types of magnetic springs, the mechanical model of monostable, bistablestate magnetic springs were established individually. Effects of stable state of magnetic springs and magnet structure parameters on stable state wereanalyzed by simulation and experiment. The results show that the structural parameters of the magnet such as diameter difference or thickness difference between two magnets have an important impact on the stable state of the magnetic spring.