Asymmetric hysteresis model of spherical wire rope isolator
Aiming at the difficulty of hysteresis model characterization caused by the nonlinear stiffness and damping characteristics of spherical wire rope isolator,a normalized Bouc-Wen hysteresis model with the improved nonlinear elastic and correction factors was proposed.In addition,the as-proposed model was further enhanced in combination with Simulink simulation,and the least square method combined with genetic algorithm was used to identify the parameters.To verify the effectiveness of the as-proposed model,the hysteresis loops of GGQ25-62L spherical wire rope isolator were drawn by numerical simulation under different working conditions and compared with experimental data.The results show that the as-proposed parameter identification method is accurate and reliable,and the experimental data are in good agreement with the theoretical curve.The model can describe the dynamic characteristics of the isolator effectively.
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