The levitation force in the high temperature superconducting (HTS) maglev system has obvious nonlinear characteristics. When the excitation frequency and amplitude meet certain conditions, nonlinear vibration phenomena such as period-doubling bifurcation would appear. Nonlinear vibration will bring difficulties to dynamic analysis and even affect the safety and comfort of driving. While an electromagnetic shunt damper (EMSD) can effectively reduce the vibration amplitude. This paper analyzes the influence of EMSD on the nonlinear vibration of HTS maglev systems from the perspective of experiments and simulations. Firstly, free vibration and forced vibrations in the resonance interval are tested. Secondly, based on numerical simulations, the vibration response under various excitation was analyzed. The results show that the EMSD can effectively suppress its nonlinear vibration. This research has reference value for the detailed understanding of the dynamic characteristics of the HTS maglev and further vehicle design.

中文翻译：

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电磁并联阻尼器对高温超导磁悬浮系统非线性振动的影响


高温超导（HTS）磁悬浮系统中的悬浮力具有明显的非线性特征。当激励频率和振幅满足一定条件时，就会出现倍周期分岔等非线性振动现象。非线性振动会给动力学分析带来困难，甚至影响驾驶的安全性和舒适性。而电磁并联阻尼器（EMSD）可以有效降低振动幅度。本文从实验和仿真的角度分析了EMSD对高温超导磁浮系统非线性振动的影响。首先，测试共振区间的自由振动和受迫振动。其次，基于数值模拟，分析了不同激励下的振动响应。结果表明EMSD能够有效抑制其非线性振动。该研究对于详细了解高温超导磁浮的动态特性以及进一步的车辆设计具有参考价值。