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针对潜艇机械设备的低频隔振难题,通过并联具有负刚度特性的双环永磁铁和线性正刚度弹簧,设计了一种新型磁力准零刚度(QZS)隔振器.利用等效磁荷法建立了双环永磁铁的磁力模型,并通过ANSYSMaxwell软件对模型进行了验证;通过曲线拟合简化磁力模型,建立了双环永磁铁型QZS隔振器的运动学模型;利用谐波平衡法求解了双环永磁铁型QZS隔振器的运动微分方程,并研究了阻尼及激励力对隔振器的幅频特性和力传递率的影响;搭建了双环永磁体型隔振器试验台,对其进行了激振实验分析,测定了不同工况下的力传递率.结果表明:相比线性隔振系统,双环永磁铁结构紧凑,摩擦力较小,双环永磁铁型QZS隔振器具有优越的隔振性能.
Aiming at the problem of low frequency vibration isolation in submarine machinery and equipment, a novel magnetic quasi-zero stiffness (QZS) vibration isolator was designed by paralleling bicyclic permanent magnets and linear positive stiffness springs with negative stiffness characteristics. And the model of the double-ring permanent magnet was validated by ANSYS Maxwell software. The kinematics model of the double-ring permanent magnet QZS isolator was established by curve fitting the simplified magnetic model. The harmonic balance method was used to solve the problem that the double-ring permanent magnet Type QZS isolator and the effect of damping and excitation force on the amplitude-frequency characteristics and force transfer rate of the isolator were studied. A dual-ring permanent magnet isolator test stand was built and excited The results show that compared with linear vibration isolation system, the double ring permanent magnet has the advantages of compact structure and small friction, and the double ring permanent magnet type QZS vibration isolator has excellent vibration isolation performance.