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为了简化车桥耦合振动的分析过程,介绍了利用简化的车辆模型在ANSYS单一环境中实现车桥耦合振动分析的方法。以一座三跨轻轨连续梁桥为例,分析行车速度和地震作用对车桥耦合振动的影响。结果表明,行车速度对桥梁跨中竖向位移影响较小,对横向位移和加速度响应影响较大;考虑地震作用与列车荷载共同作用后,桥梁竖向位移、加速度及轴力峰值大于仅有列车荷载作用下的结果,说明地震作用和列车荷载存在一定程度的耦合。
In order to simplify the analysis process of the coupling vibration of the axle and bridge, a method to realize the coupling vibration analysis of the axle and axle in a single environment of ANSYS is introduced with a simplified vehicle model. Taking a three-span light-gauge continuous girder bridge as an example, the influence of driving speed and earthquake on the coupling vibration of the axle is analyzed. The results show that the driving speed has little influence on the mid-span vertical displacement of the bridge and has a great influence on the lateral displacement and acceleration response. Taking into account the interaction between the earthquake action and the train load, the vertical displacement, acceleration and axial peak value of the bridge are greater than those of the train The result of the load shows that there is a certain degree of coupling between the earthquake action and the train load.