桥梁结构刚度对高速列车—轨道—桥梁耦合系统动力特性的影响
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摘要
桥梁结构刚度对高速列车—轨道—桥梁耦合系统的动力学特性具有重要的影响,直接关系到桥上列车的行车安全性和运行平稳性。基于列车—轨道—桥梁动力相互作用理论,以高速铁路常用的简支箱梁桥和双块式无砟轨道为研究对象,采用列车—轨道—桥梁动力学仿真通用软件TTBSIM2.0,研究桥梁结构刚度对高速列车—轨道—桥梁耦合系统动力性能的影响规律。结果表明:当桥梁梁体的刚度或者桥墩的横向刚度不足时,车辆和桥梁的相关动力性能指标将随着刚度的减少而急剧增大,严重影响列车过桥时的安全性和平稳性;当梁体垂向刚度不足时,有可能会引发车桥共振现象;当桥梁结构刚度满足设计规范要求时,车桥系统动力响应指标随刚度变化不明显,此时行车速度和轨道不平顺成为影响行车安全性和平稳性的主要因素。
The dynamic performances of high-speed train-track-bridge coupled system are significantly affected by the structure stiffness of bridge,which directly influences the running safety and ride comfort of a train on the bridge.Based on train-track-bridge dynamic interaction theory,the influences of structure stiffness of bridge on the dynamic responses of the coupled system were analyzed using the train-track-bridge dynamic simulation software TTBSIM2.0,in which a simply supported bridge and double-block ballastless track both commonly used in high-speed railway were chosen to be the study object.Results show that when the stiffness of beam or the lateral stiffness of piers is insufficient,the major dynamic indexes of train and bridge increase dramatically with the decrease of the stiffness,and the running safety and the ride comfort of the train are deteriorated severely.In particular,the resonance of beam excited by passing train may occur if the vertical stiffness of beam is insufficient.When the structure stiffness of bridge satisfies the design code,the dynamic responses of train-bridge system vary little with the change of stiffness.The running speed and track irregularities become the main factors to influence the running safety and ride comfort of train.
The dynamic performances of high-speed train-track-bridge coupled system are significantly affected by the structure stiffness of bridge,which directly influences the running safety and ride comfort of a train on the bridge.Based on train-track-bridge dynamic interaction theory,the influences of structure stiffness of bridge on the dynamic responses of the coupled system were analyzed using the train-track-bridge dynamic simulation software TTBSIM2.0,in which a simply supported bridge and double-block ballastless track both commonly used in high-speed railway were chosen to be the study object.Results show that when the stiffness of beam or the lateral stiffness of piers is insufficient,the major dynamic indexes of train and bridge increase dramatically with the decrease of the stiffness,and the running safety and the ride comfort of the train are deteriorated severely.In particular,the resonance of beam excited by passing train may occur if the vertical stiffness of beam is insufficient.When the structure stiffness of bridge satisfies the design code,the dynamic responses of train-bridge system vary little with the change of stiffness.The running speed and track irregularities become the main factors to influence the running safety and ride comfort of train.
引文
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[11]西南交通大学,中国铁道科学研究院,北京交通大学,中南大学.列车—线路-桥梁动力学仿真通用软件TTBSIM2.0使用手册[R].成都:西南交通大学,2010.
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[15]曾庆元,郭向荣.列车桥梁时变系统振动分析理论及应用[M].北京:中国铁道出版社,1999.
[16]西南交通大学,中国铁道科学研究院,北京交通大学,中南大学.列车—线路—桥梁动力学仿真通用软件研究报告[R].成都:西南交通大学,2005.
[17]西南交通大学,中国铁道科学研究院,北京交通大学,中南大学,铁道第四勘测设计院.客运专线典型桥梁列车走行性研究报告[R].成都:西南交通大学,2010.
[18]中华人民共和国铁道部.TB10621—2009高速铁路设计规范(试行)[S].北京:中国铁道出版社,2010.
[19]松浦章夫.高速铁路桥梁动力问题的研究[J].日本土木学会论文报告集,1976,12(256):35-47.(MATSUURA Akio.High-Speed Dynamic Problem of Railway Bridge[J].Proceedings of the Japan Society of CivilEngineers,1976,12(256):35-47.in Japanese)
[2]辛学忠,郭向荣.大跨度铁路桥梁刚度统一描述方法探讨[J].铁道工程学报,2007(1):82-86.(XIN Xuezhong,GUO Xiangrong.Exploration on Unified Describing Method for Rigidity of Large-Span RailwayBridge[J].Journal of Railway Engineering Society,2007(1):82-86.in Chinese)
[3]李小珍.高速铁路列车—桥梁系统耦合振动理论及应用研究[D].成都:西南交通大学,2000.(LI Xiaozhen.Studies on Theory and Application of Train-Bridge System Coupling Vibration in High-Speed Railway[D].Chengdu:Southwest Jiaotong University,2000.in Chinese)
[4]俞韩斌,高芒芒,杨宜谦.既有线32m下承式钢板梁加固方案的车—桥动力仿真分析[J].中国铁道科学,2008,29(1):26-29.(YU Hanbin,GAO Mangmang,YANG Yiqian.Analysis on Train-Bridge Dynamic Simulation for Reinforcement ofthe 32mThrough Steel Plate Girders on Existing Line[J].China Railway Science,2008,29(1):26-29.in Chinese)
[5]西南交通大学,郑州铁路局.既有线提速200km.h-1关键技术的试验研究—桥梁安全性评估报告[R].成都:西南交通大学,2010.
[6]翟婉明,蔡成标,王开云.高速列车—轨道—桥梁动态相互作用原理及模型[J].土木工程学报,2005,38(11):132-137.(ZHAI Wanming,CAI Chengbiao,WANG Kaiyun.Mechanism and Model of High-Speed Train-Track-Bridge Dy-namic Interaction[J].China Civil Engineering Journal,2005,38(11):132-137.in Chinese)
[7]翟婉明.车辆—轨道耦合动力学[M].3版.北京:科学出版社,2007.
[8]ZHAI W W,CAI C B.Train/Track/Bridge Dynamic Interactions:Simulation and Applications[J].Vehicle SystemDynamics,2002,37(Supplement):653-665.
[9]蔡成标.无砟轨道动力学理论及应用[J].西南交通大学学报,2007,41(3):255-261.(CAI Chengbiao.Dynamics of Ballastless Track and Its Application[J].Journal of Southwest Jiaotong University,2007,41(3):255-261.in Chinese)
[10]王少林,翟婉明.地震作用下高速列车—线路-桥梁系统的动力响应[J].西南交通大学学报,2011,46(1):56-62.(WANG Shaolin,ZHAI Wanming.Dynamic Responses of High-Speed Train-Track-Bridge System under Seismic Ex-citations[J].Journal of Southwest Jiaotong University,2011,46(1):56-62.in Chinese)
[11]西南交通大学,中国铁道科学研究院,北京交通大学,中南大学.列车—线路-桥梁动力学仿真通用软件TTBSIM2.0使用手册[R].成都:西南交通大学,2010.
[12]夏禾,张楠.车辆与结构动力相互作用[M].2版.北京:科学出版社,2005.
[13]蔡成标.高速铁路列车—线路—桥梁耦合振动理论及应用研究[D].成都:西南交通大学,2004.(CAI Chengbiao.Theory and Application of Train-Track-Bridge Coupling Vibration in High-Speed Railways[D].Chengdu:Southwest Jiaotong University,2004.in Chinese)
[14]高芒芒.高速铁路列车—线路—桥梁耦合振动及列车走行性研究[D].北京:铁道科学研究院,2001.(GAO Mangmang.Study on Train-Track-Bridge Coupling Vibration and Train Running on High-Speed Railway[D].Beijing:China Academy of Railway Sciences,2001.in Chinese)
[15]曾庆元,郭向荣.列车桥梁时变系统振动分析理论及应用[M].北京:中国铁道出版社,1999.
[16]西南交通大学,中国铁道科学研究院,北京交通大学,中南大学.列车—线路—桥梁动力学仿真通用软件研究报告[R].成都:西南交通大学,2005.
[17]西南交通大学,中国铁道科学研究院,北京交通大学,中南大学,铁道第四勘测设计院.客运专线典型桥梁列车走行性研究报告[R].成都:西南交通大学,2010.
[18]中华人民共和国铁道部.TB10621—2009高速铁路设计规范(试行)[S].北京:中国铁道出版社,2010.
[19]松浦章夫.高速铁路桥梁动力问题的研究[J].日本土木学会论文报告集,1976,12(256):35-47.(MATSUURA Akio.High-Speed Dynamic Problem of Railway Bridge[J].Proceedings of the Japan Society of CivilEngineers,1976,12(256):35-47.in Japanese)
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