浮置板轨道大量应用于振动敏感线路段。本研究面向城市轨道交通列车车速和载客数量易频繁变化而引起的时变振动，针对浮置板轨道低频隔振性能弱、轨面垂向变形要求高、车内振动噪声强的特点，基于线路段存在的低频、变频和冲击等复杂振动特征，创新提出自学习快速调谐主动吸振机理，使吸振在列车每次经过线路段时通过“试错”不断“总结经验”，在与时变复杂振动环境的交互过程中实现吸振自学习，以提前确定调谐参数，在列车经过的短时间内吸振可迅速、准确地调谐至最优状态，实现浮置板轨道的快速振动抑制，降低轮轨振动对乘客和沿线居民的影响。研究内容包括：“列车-浮置板轨道-吸振”系统耦合动力学建模与吸振分布的优化；主动吸振的“电-磁-刚度/阻尼”调谐机理；时变复杂响应的自学习吸振快速振动控制机理；样机试验验证。研究成果可为未来轨道交通浮置板轨道的振动控制问题提供重要的理论与实践支撑。

Floating slab tracks (FSTs) are widely used in vibration-sensitive train routes. This research focuses on the time-varying vibration caused by the frequent change of speed and passenger quantity of the urban rail transit vehicles, according to the features of poor low-frequency vibration isolation performance, strict rail vertical surface deformation requirement and strong vibration/noise inside the vehicles of FST, the self-learning fast tuning mechanism of active vibration absorber is innovatively proposed for the complex vibration characteristics of low frequency, variable frequency and impulse, the absorber can continuously "summarize experience" after several trials that the train passes by the FST, and realizes self-learning in the interaction with time-varying complex vibration environment to determine the tuning parameters in advance, then the absorber can accurately tune to the optimal status and help rapidly suppress the vibration of the FST in the short time of the train passes by. In this way, the influence of wheel-rail vibration on the passengers and residents along the route can be reduced. The research includes the following four aspects: Dynamic modeling of the coupling vehicles-FST-absorber system and optimization of the absorber distribution; The electro-magnetic-stiffness/damping tuning mechanism of the active absorber; Fast vibration suppressing mechanism of self-learning active absorber for time-varying complex response; Experimental verification of the self-learning active absorber prototype. The research results can provide important theoretical and experimental support for the vibration control of FST in the future rail transit.