A three-dimensional finite element model for analysis of steel spring floating slab track was established based on the ANSYS software. The influence of failure of the fasteners and vibration isolators on the dynamic response of the train-track system with steel spring floating slabs was studied. Research shows that when the train is travelling on the floating slab track with the failure of the fasteners and vibration isolators, the vertical displacement, acceleration and the constraint reaction force near the fastener of the rail will change significantly. This change becomes more and more obvious with the increasing of the number of the failure fasteners and vibration isolators. The influence of the failure fasteners and vibration isolator group with their centers at the end of the floating slab is more significant than those with the centers at the middle of the floating slab.%基于ANSYS软件建立钢弹簧浮置板轨道三维有限元分析模型,研究扣件和隔振器失效对地铁轨道交通列车—钢弹簧浮置板系统的动力响应影响.研究表明:当列车行驶在扣件和隔振器失效的钢弹簧浮置板轨道上,钢轨垂向位移、加速度和临近扣件支点反力变化显著,且随着失效扣件和隔振器数目增加变化越明显;失效扣件和隔振器的中心在浮置板端部比其在浮置板中部的影响大.
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