A method for overturning risk assessment of trains crossing bridges based on vibration mode superposition method

Abstract

The invention discloses a method for evaluating the overturning risk of a train crossing a bridge based on the vibration mode superposition method, which includes: establishing the motion equation of the vehicle system, establishing the bridge system motion equation based on the vibration mode superposition method, establishing a simplified wheel-rail contact model, establishing The overall motion equation of the vehicle-bridge system. Based on the simplified wheel-rail contact model, the iterative calculation of the wheel-rail interaction force is avoided, which provides a basis for the motion equation of the combined vehicle system and bridge system; the overall motion equation of the vehicle-bridge system avoids the separate iterative solution of the motion of the vehicle system and bridge system The equation realizes the synchronous solution of vehicle and bridge response, and improves the calculation efficiency of vehicle-bridge system response. The invention effectively reduces the calculation amount of the response analysis of the train-bridge system under the action of transverse wind, and can quickly evaluate the overturning risk of the train crossing the bridge.

Description

technical field [0001] The invention relates to the technical field of high-speed train operation safety analysis, in particular to a method for evaluating the overturning risk of a bridge-crossing train based on a vibration mode superposition method. Background technique [0002] In the past ten years, high-speed trains have developed rapidly all over the world due to their fast running speed, high punctuality, high comfort, energy saving and environmental protection, and China's high-speed railway construction is at the leading level in the world. Along with the implementation of my country's western development strategy, in order to promote the economic development of the central and western regions of my country and strengthen the connection between the eastern and western regions, the state has focused on planning and building a number of high-speed railways in the western mountainous areas, such as Changkun Passenger Railway, Chengdu-Chongqing Railway Passenger Train, X...

AI Technical Summary

Problems solved by technology

[0004] In the existing studies, the vehicle-bridge system under the action of transverse wind is regarded as a complex large system, and the train model, bridge model, and wheel-rail contact relationship are considered in detail, and the motion equation of the vehicle-bridge system established is complex, and The calculation process is quite time-consuming

However, the criterion for judging the train overturning under the action of cross wind is whether the wheel load reduction rate exceeds the limit value, and the calculation of the wheel load reduction rate is not sensitive to the complexity of the train model and wheel-rail contact relationship

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