Theoretical design of permanent magnet negative-stiffness devices(PMNSDs)was developed with the finite element software ANSYS.The effects of magnet material characteristics and structural parameters on their negative-stiffness performance were analyzed using APDL.The results showed that the devices' negative-stiffness performance can be improved by using magnetizers and the magnet material with higher remanence and lower coercivity,the larger ratio of length to width,the appropriate ratio of width to thickness,and the devices'clearance as small as possible.Based on the above study results,the theoretical design of a low frequency vibration isolation platform using PMNSDs and wire-rope isolators was developed.%基于ANSYS的有限元法开展了三磁体永磁负刚度装置优化设计，采用APDL参数化设计语言，分析了永磁体材料特性及结构参数对负刚度性能的影响。分析表明导磁体能较大程度增强装置负刚度性能；选择剩磁大，矫顽力小的永磁体材料能增强装置的负刚度性能；在体积恒定的情况下，选择大的长宽比以及合适的宽厚比，能获得更大的负刚度性能；装置的初始间隙越小，负刚度性能越强。根据分析结果，采用永磁负刚度装置及钢丝绳隔振器，开展了低频隔振平台的理论设计。
展开▼
