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。
Abstract
Optimization design of permanent magnet negative-stiffness device(PMNSD) is developed through finite element method using ANSYS, the effects of magnet material character and structure parameter to negative-stiffness ability are analyzed using APDL. The result shows that the device’s negative-stiffness ability can be increased by using magnetizer, using the magnet material with high remanence and low coercivity, using large ratio of length to width and appropriate ratio of width to thickness, using as small clearance as possible. Base on the study above, theory design of low frequency vibration isolation platform using PMNSDs and wire-rope isolators is developed.
关键词
负刚度 /
永磁体 /
有限元法 /
低频 /
隔振平台
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Key words
negative stiffness /
permanent magnets /
finite element method /
low frequency /
isolation platform
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