基于APDL语言的高速铁路箱型梁车-桥耦合动力响应研究
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摘要
研究了在高速列车动荷载作用下铁路桥梁的车-桥耦合动力响应。基于ANSYS软件中的APDL语言,根据材料性能和轮轨接触力学,建立了高速列车通过箱型梁的分析模型。结果表明,列车动载引起的桥梁变形约为恒载变形的十分之一。不同列车行驶速度下的箱型梁跨中竖向位移差异很小,表明箱型梁的跨中竖向位移主要受材料性能的影响,而非列车行驶速度的影响。
In this paper, the vehicle-bridge coupling dynamic response of railway bridges under high-speed train dynamic loads is studied.Based on APDL language of ANSYS software, according to material properties and wheel-rail contact mechanics, the analysis model of box gird for high-speed train passing is established. The results show that the bridge deformation caused by train dynamic load is about one tenth of that caused by dead load. Vertical displacement of box gird in mid-span varies little under different train speed, which indicates that the vertical displacement of box gird in mid-span is mainly affected by material properties, rather than train speed.
In this paper, the vehicle-bridge coupling dynamic response of railway bridges under high-speed train dynamic loads is studied.Based on APDL language of ANSYS software, according to material properties and wheel-rail contact mechanics, the analysis model of box gird for high-speed train passing is established. The results show that the bridge deformation caused by train dynamic load is about one tenth of that caused by dead load. Vertical displacement of box gird in mid-span varies little under different train speed, which indicates that the vertical displacement of box gird in mid-span is mainly affected by material properties, rather than train speed.
引文
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[2]陈令坤,左一舟,陈亮.无砟轨道结构层对高速铁路列车-桥梁系统动力响应的影响[J].铁道建筑,2014(8):5-7.
[3]Azimi H,Galal K,Pekau O A.A numerical element for vehicle bridge interaction analysis of vehicles experiencing sudden deceleration[J].Engineering Structures,2013,49:792-805.
[4]张鹏飞.复杂荷载条件下桥上CRTS域型板式无砟轨道无缝线路纵向力研究[D].北京:北京交通大学,2018.
[5]杜宪亭,夏禾.地震空间变异性对车桥系统响应的影响分析[J].工程力学,2012,29(9):106-111.
[6]翟婉明.列车-轨道-桥梁动力相互作用理论与工程应用[M].北京:科学出版社;2011.
[7]Kalker JJ.On the rolling contact of two elastic bodies in the presence of dry friction.Doctor Dissertation,Delft University of Technology,Netherlands;1967.
[8]翟婉明.高速列车与线桥结构动态相互作用理论分析与试验研究[J].学术动态,2004(1):20-21.
[9]陈果,翟婉明.铁路轨道不平顺随机过程的数值模拟[J].西南交通大学学报,1999(2):13-17.
[10]TB/T 3488-2017中华人民共和国铁道行业标准[S].
[11]周刘茜,郑史雄,陈航.基于三角级数法合成多维多点非平稳地震动[J].四川建筑,2018,38(1):158-160.