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为提高隔振系统对低频微振动的隔离能力,研究了一种新型三磁体负刚度结构,分析了该结构产生负刚度的原理。将三磁体负刚度结构与隔振系统并联使用,在不影响原隔振系统载荷性能的情况下可降低系统的固有频率。分析了隔振器刚度及磁体间初始间隙对并联系统刚度特性的影响,提出从稳定性和隔振性能两方面来进行低频隔振系统设计。
In order to improve the isolation ability of vibration isolation system to low frequency micro vibration, a new type of three magnet negative stiffness structure is studied, and the principle of negative stiffness of the structure is analyzed. Using the three-magnet negative stiffness structure in parallel with the vibration isolation system can reduce the natural frequency of the system without affecting the load performance of the original vibration isolation system. The influence of isolator rigidity and initial clearance between magnets on the stiffness characteristics of parallel system is analyzed. The design of low frequency vibration isolation system is proposed from the aspects of stability and vibration isolation performance.