Influence of high-speed railway bridge bearing stiffness on vehicle-bridgecoupling system
As a key part of high-speed railway simulation,the dynamic response of the vehicle-bridge coupling system is evaluated,and the variation characteristics of the system index are analyzed based on the bearing stiffness.The results show that the vertical acceleration of the vehicle body in the vehicle sys-tem has a high correlation with the stiffness of the bearing,while the safety indexes such as wheel-rail force and derailment coefficient are less affected by the stiffness of the bearing.The bearing stiffness in the bridge system has a large correlation with the vertical displacement,the lateral acceleration in the middle area of the bridge is negatively correlated with the bearing stiffness,and the transverse vibration magnitude of the tower top is positively correlated with the bearing stiffness.Compared with rigid wheels,flexible wheels are more sensitive to the vibration of bridges and vehicle bodies,and have less correlation with other indicators.The vehicle-bridge coupling system accurately determines the variation character-istics of each index of high-speed EMUs under different bearing stiffnesses,which provides a reference for the design optimization of subsequent products.
high speed railwaybearing stiffnessvehicle-bridge coupling systemflexible wheel
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