桥墩横向位移对车-轨-桥耦合系统动力响应的影响分析

Influence of pier lateral displacement on dynamic response of train-track-bridge coupled system

为了提高列车运营的安全性和舒适性,基于SIMPACK-ANSYS联合仿真平台,以某4跨32 m简支箱梁桥、8节列车为框架,建立了列车-轨道-桥梁的耦合系统动力分析模型,开展了桥墩横向位移量对列车动力响应的仿真计算与影响分析。结果表明:桥墩横向位移对列车振动响应影响尤为明显,对桥梁振动响应影响并不显著;当桥墩横向位移超过26.4 mm时,列车的轮轴横向力超过了安全限值(62 kN)。因此,桥墩横向位移值应控制在26.4 mm以内。

To improve the safety and comfort of train operation,a coupled system dynamics analysis model of train-track-bridge was established based on the SIMPACK-ANSYS joint simulation platform,with a 4-span 32 m simply supported box girder bridge and an 8-car train as the framework.The simulation calculation and impact analysis of the effect of bridge pier lateral displacement on the dynamic response of the train were conducted.The study shows that the lateral displacement of the bridge pier has a significant impact on the vibration response of the train,but not significant on the vibration response of the bridge.When the lateral displacement of the bridge pier exceeds 26.4 mm,the lateral force on the train’s axle exceeds the safety limit(62 kN).Therefore,the lateral displacement of the bridge pier should be controlled within 26.4 mm.