铁道科学与工程学报2017，Vol.14Issue(6)：1261-1269,9.
基于车−轨−隧一体化模型的重载铁路隧道动力响应特性分析
Study on the dynamic responses of heavy haul railway tunnel based on the model of train-track-tunnel coupling system
摘要
Abstract
Based on Hertz nonlinear theory, and considering contacts between the wheel and rail, a train- track-tunnel system coupling 3-D finite element model was established, and the dynamic response of tunnel structure under heavy load was calculated and analyzed. Through the comparative analysis with the measured data, the reliability of the integrated calculation model was verified. Furthermore, aimed at the Menghua railway loess tunnel engineering, the tunnel characteristics of the dynamic responses for 30 t axle load were analyzed. The calculation results show that: at the bottom of the tunnel structure, displacement, stress, acceleration increase significantly under 30 t axle train load, and they are significantly affected by the influence of train vibration load. At the lower section of the track and the center section of the tunnel, the compressive stress along the depth direction is attenuated, and the attenuation speed is slow down. Tensile stress is increased along the depth in the center section of the tunnel, the maximum tensile stress appears at the bottom of the primary support of tunnels. All of this have a negative impact on the tunnel structure.关键词
重载铁路隧道/车−轨−隧一体化模型/动力响应Key words
heavy haul railway tunnel/train-track-tunnel coupling model/dynamic response分类
交通工程引用本文复制引用
肖鹏,彭立敏,施成华,杨高尚,雷明锋..基于车−轨−隧一体化模型的重载铁路隧道动力响应特性分析[J].铁道科学与工程学报,2017,14(6):1261-1269,9.基金项目
国家自然科学基金资助项目(51278494) （51278494）
国家自然科学基金煤炭联合基金资助项目(U1361204) （U1361204）
国家自然科学基金高铁联合基金资助项目(U1434206) （U1434206）
