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针对土体-隧道-列车动力相互作用的特点,建立地震作用下隧道-列车系统的三维有限元模型,运用基于接触负载均衡的显式并行计算方法求解计算。研究了地震作用下隧道-列车系统的动力响应,并对地铁列车运行安全性进行了评价,分析了行车速度及地震强度对地铁运行安全性的影响。数值分析结果表明:地震作用对隧道-列车系统动力响应影响显著,地震作用使系统动力响应明显增大,并使地铁运行安全性及平稳性大大降低;列车动载荷对地震作用下的隧道系统动力响应影响较小;无震工况下,地铁运行安全指标对车速变化并不敏感;地震工况下,随着地震强度的增大,车速对地铁运行安全性的影响逐渐增大。
According to the characteristics of soil-tunnel-train dynamic interaction, a three-dimensional finite element model of tunnel-train system under earthquake action is established, and the explicit parallel calculation method based on contact load balance is used to solve the calculation. The dynamic response of the tunnel-train system under earthquake is studied, and the safety of the subway train is evaluated. The influence of traffic speed and earthquake intensity on the safety of the subway is analyzed. The results of numerical analysis show that the seismic effect has a significant impact on the dynamic response of the tunnel-train system. The seismic response increases the system dynamic response and greatly reduces the safety and stability of the subway. The train dynamic load Under the condition of no earthquake, the subway safety indicators are not sensitive to the change of vehicle speed. Under the earthquake conditions, the influence of vehicle speed on the operation safety of the subway increases with the increase of earthquake intensity.