Abstract In this paper, a semi-active suspension system, composed of variable stiffness (VS) magnetorheological (MR) dampers, was developed and investigated theoretically and experimentally, aiming to improve the ride comfort of high-speed train by avoiding the train body resonance. Firstly, a full-scaled high-speed train model with 17-degree-of-freedom (17-DOF), whose secondary lateral suspension was installed with two VS-MR dampers, was established. And the numerical evaluation on the performance of the VS suspension was conducted. Secondly, a scaled high-speed railway vehicle and the VS suspension were designed and manufactured for experimental evaluation on a vibration generating platform under different excitations. The experimental results are consistent with the numerical evaluation results, which show that the VS suspension can effectively avoid the train's resonance in lateral direction and greatly improve the ride comfort compared with the traditional suspension system.

中文翻译：

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轨道车辆刚度可控悬架避免共振的理论与实验研究

摘要 本文开发了一种由可变刚度（VS）磁流变（MR）阻尼器组成的半主动悬架系统，并进行了理论和实验研究，旨在通过避免列车车身共振来提高高速列车的乘坐舒适性。 . 首先，建立了17自由度（17-DOF）的全尺寸高速列车模型，其二级横向悬架安装了两个VS-MR阻尼器。并对VS悬架的性能进行了数值评估。其次，设计并制造了比例尺高速铁路车辆和VS悬架，用于在不同激励下的振动发生平台上进行实验评估。实验结果与数值评价结果一致，