关键词: 振动与波, 矩形磁铁, 负刚度, 准零刚度, 低频隔振

Abstract:

Negative stiffness mechanism can be used to isolate the low frequency vibration of the system. In this paper, an analytical expression of the force and stiffness was derived by using the equivalent magnetic charge method. Meanwhile, the optimal arrangement and magnetization of the rectangular permanent magnets were obtained to accomplish the negative stiffness. Finally, the trimagnets quasi-zero-stiffness vibration isolation was designed. The simulation results proved that the correctness of the theoretical analysis and the excellent low frequency vibration isolation performance was achieved without affecting the load ability.