Coupled vibration analysis of train-track-bridge system under winds:a structural periodicity-based efficient precise integration method
1 Background With the rapid development of bridge span and train speed,the dynamic performance of bridge and train has attracted great attention to ensure the serviceability,running safety andride comfort.The track-sleeper-ballast(TSB) system has been demonstrated to play animportant role in the train-bridge interaction.A number of studies have been focused on thecomputational efficiency in the simulation of the entire train-track-sleeper-ballast-bridge(TTSBB) system.Recently,a hybrid model to investigate the TTSBB dynamic interaction hasbeen developed,where the system is divided into two subsystems of train-track(TB) andbridge.The hybrid model can avoid the iterative equilibrium calculations between the wheel and the rail.Based on the hybrid model,an efficient scheme using multi-time(MT) steps wasestablished to further reduce the computational costs.Nevertheless,the computationalexpense is still high due to a large number of degrees of freedom for the entire system and afine time step to ensure the stability and accuracy requirements of wheel-rail contactsimulation.To effectively examine the coupled vibration analysis of TTSBB under winds,astructural periodicity-based efficient precise integration method(SP-PIM) is proposed in thisstudy,where the use of the periodic characteristics of track-sleeper-ballast(TSB) system tosignificantly enhance the PIM efficiency is highlighted.
Kang Shi Xuhui He Han Wu Teng Wu
School of Civil Engineering,Central South University,Changsha,China;Department of Civil,Structural a School of Civil Engineering,Central South University,Changsha,China Department of Civil,Structural and Environmental Engineering,University at Buffalo-The State Univ.of
国际会议
The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)
青岛
英文
2056-2057
2018-07-22（万方平台首次上网日期，不代表论文的发表时间）