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- W2890675193 abstract "Nonlinear isolators can decrease dynamic stiffness and thus enhance vibration isolation performance. This paper presents a novel passive vari-stiffness nonlinear isolator with the magnetic repulsive force and magnetic attractive force effects. The isolator consists of a passive mass-spring-damper element and a nonlinear magnetic coupling element. The nonlinear magnetic coupling element contains three moving ring permanent magnets and three fixed ring magnets. The fixed magnets assembled separately at the three adjustable devices that are uniformly distributed along the circumference. The expression of the nonlinear magnetic force is obtained according to the Amperian current model, and the corresponding equivalent nonlinear magnetic stiffness is derived and approximated. The governing equation of the proposed isolator is established and the transmissibility is analyzed with the harmonic balance method. The experiment was set up to verify both the theoretical model and simulations. Both the numerical and experimental results point out that the repulsive force serves as a softening spring to enhance the isolation performance at the higher frequency, while the attractive force serves as a hardening spring to improve the isolation performance at a relative lower frequency bandwidth." @default.
- W2890675193 created "2018-09-27" @default.
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- W2890675193 date "2018-11-01" @default.
- W2890675193 modified "2023-10-17" @default.
- W2890675193 title "A vari-stiffness nonlinear isolator with magnetic effects: Theoretical modeling and experimental verification" @default.
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- W2890675193 doi "https://doi.org/10.1016/j.ijmecsci.2018.09.031" @default.
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