传统被动式阻尼器由于自身参数不可调节，当列车行驶速度提升到一定值时，面临着失效的风险。因此寻求一种参数可调，易于控制，稳定性好的振动控制方法是增加高速列车安全性能亟需解决的问题。本课题提出利用磁流变阻尼器这一典型的半主动控制设备，研制开发针对高速列车的智能阻尼系统以提升列车动力学安全性能的概念。本项目利用测试装置及试验台架上进行磁流变阻尼器的动态响应特性实验分析，对磁流变阻尼器理论模型进行实验验证；基于有限元及物理建模，推导磁流变阻尼器的设计参数与阻尼力之间的关系，为磁流变阻尼器设计提供指导；通过建立磁流变阻尼器理论模型及列车动力学建模分析列车在直行，弯道，桥梁，弹性轨道上的动力学响应特性，系统地研究磁流变智能阻尼系统对高速列车横向及纵向临界速度及稳定性的影响，得出磁流变阻尼器设计需求。从而揭示磁流变智能阻尼系统对高速列车的减振机理，为高速列车用智能阻尼系统提供设计的理论指导。

The traditional passive damper may lose effect when a high-speed train travels at a critical speed, because the parameters of the passive damper are not adjustable. Thus in order to improve the safety of high-speed trains, it is crucial to find a vibration control solution which is adjustable, controllable, and stable. In this proposal, a smart damping system based on magnetorheological (MR) dampers is presented for improving the dynamic behavior of the high-speed train. MR damper is a typical semi-active vibration controller, which has been widely applied on many fields. In order to reveal the mechanisms of vibration control of high-speed trains by MR dampers and provide theoretical guideline for smart damping system design, this project will comprehensively study the influences of smart damping system on the critical speeds and stability of high-speed trains by analyzing the dynamic behavior of high-speed trains with MR dampers. The theoretical model of MR dampers will be validated by experiments and the relationship between damping force and the parameters of MR dampers will also be derived based FE and theoretical analysis.