Efficient dynamic analysis method for train-rail-structure coupling system

Abstract

The invention discloses an efficient dynamic analysis method for a train-rail-structure coupling system. The method is characterized by comprising a train structure model module, a rail structure model module, a lower structure model module, a wheeltrack dynamic contact model module between wheels and a rail steel rail, a rail unsmooth module and a dynamic mutual action model module between the rail and a lower structure, wherein the train structure model module and the rail structure model module are coupled into an integral time-varying train-rail subsystem through a wheeltrack contact relationship, and the lower structure is a lower structure subsystem; and the train-rail subsystem and the lower structure subsystem are coupled through a mutual action force equilibrium condition between the rail and the lower structure; and in each time step, the train-rail subsystem and the lower structure subsystem are subjected to equilibrium iteration solving to realize the equilibrium convergence calculation of the mutual action force. By use of the method, the dynamic analysis efficiency of the train-rail-structure coupling system can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of railway engineering application and design, in particular to an efficient dynamic analysis method for a vehicle-track-structure coupling system based on a vehicle-track-structure space coupling model. Background technique [0002] Due to the high speed of trains on existing lines, newly-built passenger dedicated lines and high-speed railways, in order to meet the requirements of driving safety and riding comfort, the relevant design codes have higher requirements for track smoothness and rigidity of the under-rail structure; at the same time, from In terms of environmental protection, land saving, site soil conditions, terrain, etc., countries with developed high-speed rail transportation such as China, France, Germany, and Japan often use viaducts as the substructure of the track in passenger dedicated lines and high-speed rail lines. Taking the Beijing-Shenzhen-Hong Kong Passenger Dedicated Line, Zhengx...

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Problems solved by technology

When the structural model is too complex and large, it will lead to very complicated derivation of the time-varying system stiffness and damping matrix, which limits the use of this method in the study of vehicle-track-structure coupled vibration

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