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Abstract

An asymmetric stiffness structure, comprising a permanent magnet (PM) and an electromagnetic coil (EC), has been designed to create a vibration isolator with high-static-low-dynamic stiffness (HSLDS). The mathematical model of the system is established using the molecular current method and is compared with simulation results. Additionally, a nonlinear dynamic model of the single-degree-of-freedom vibration isolation system is developed. The influence of factors such as excitation and current on the displacement transmissibility of the system is analyzed using the incremental harmonic balance method (IHB). To validate the findings, an experimental test system is constructed. The results of the validation demonstrate that by adjusting the current in the EC, without altering the structural parameters of the system, the natural isolation frequency of the vibration isolation system can be reduced. This adjustment broadens the vibration isolation frequency band.

Keywords

high-static-low-dynamic stiffness electromagnetism vibration isolation current

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High-Static-Low-Dynamic Stiffness Isolation with Asymmetric Stiffness Structure

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