大跨度连续刚构拱桥无砟轨道动力特性分析
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摘要
研究目的:目前大跨度桥上铺设无砟轨道的技术尚不成熟,缺乏实践经验。本文结合西安至延安高铁王家河特大桥的特点,通过刚体动力学方法及有限元方法建立车桥耦合振动模型,分析不同桥梁预拱度和轨道不平顺共同作用下列车过桥时的安全性及平稳性,并参照相应规范给出安全舒适性评价;根据车桥耦合振动模型的仿真结果,利用频谱分析方法,研究不同时速下高低不平顺波长与车体垂向加速度的关联关系,给出列车不同时速的长波不平顺管理建议值。研究结论:(1)跨中预拱值设为(230±20) mm且预拱曲线按照余弦曲线分配时,列车安全性与舒适性能够满足200～350 km/h的通过速度需求;(2)针对长波不平顺管理值,200 km/h时建议大于70 m,250 km/h时建议大于85 m,300 km/h时建议大于100 m,350 km/h时建议大于115 m;(3)本研究结论对大跨度铁路桥梁变形控制和轨道平顺度标准的研究具有参考价值。
Research purposes: At present,the technology for laying ballastless tracks on long span bridges is still immature and lacks practical experience. Based on the characteristics of Wangjiahe Bridge of Xi'an-Yan'an high speed railway,rigid body dynamics method and finite element method are used to establish the coupled vibration model of the vehicles and bridge,both safety and stability of the bridges under the combined action of different bridge pre-arching values and track irregularity are analyzed,then give a safety and comfort evaluation with reference to the corresponding specifications; According to the simulation results of the coupled vibration model of vehicles and bridge,the correlation analysis between high and low irregularities at different speeds and the vertical acceleration of the vehicle body is studied by using the spectrum analysis method,suggested management values for long wave irregularities of trains at different speeds are given.Research conclusions:( 1) When the pre-arching value is set to( 230 ± 20) mm and the pre-arching curve is distributed according to the cosine curve,the safety and comfort of the train can meet the passing speed requirement of200 km/h ～ 350 km/h;( 2) For long wave irregularity management wavelength,it is recommended to be greater than70 m when speed at 200 km/h,it is recommended to be greater than 85 m when speed at 250 km/h,it is recommended to be greater than 100 m when speed at 350 km/h,it is recommended to be greater than 115 m when speed at 350 km/h;( 3) The research conclusions have reference value for the study of deformation control and track regularity standard of long-span railway bridges.
Research purposes: At present,the technology for laying ballastless tracks on long span bridges is still immature and lacks practical experience. Based on the characteristics of Wangjiahe Bridge of Xi'an-Yan'an high speed railway,rigid body dynamics method and finite element method are used to establish the coupled vibration model of the vehicles and bridge,both safety and stability of the bridges under the combined action of different bridge pre-arching values and track irregularity are analyzed,then give a safety and comfort evaluation with reference to the corresponding specifications; According to the simulation results of the coupled vibration model of vehicles and bridge,the correlation analysis between high and low irregularities at different speeds and the vertical acceleration of the vehicle body is studied by using the spectrum analysis method,suggested management values for long wave irregularities of trains at different speeds are given.Research conclusions:( 1) When the pre-arching value is set to( 230 ± 20) mm and the pre-arching curve is distributed according to the cosine curve,the safety and comfort of the train can meet the passing speed requirement of200 km/h ～ 350 km/h;( 2) For long wave irregularity management wavelength,it is recommended to be greater than70 m when speed at 200 km/h,it is recommended to be greater than 85 m when speed at 250 km/h,it is recommended to be greater than 100 m when speed at 350 km/h,it is recommended to be greater than 115 m when speed at 350 km/h;( 3) The research conclusions have reference value for the study of deformation control and track regularity standard of long-span railway bridges.
引文
[1]郑强.昌赣客专赣江特大桥施工监控的研究与实践[D].成都:西南交通大学,2018.Zheng Qiang. The Research and Practice of Construction Monitoring and Control of Ganzhou Ganjiang Bride in Changgan Passenger Dedicated Line[D]. Chengdu:Southwest Jiaotong University,2018.
[2]勾红叶,石晓宇,周文,等.铁路大跨T形刚构桥车桥耦合振动与动力性能[J].西南交通大学学报,2018(4):679-686.Gou Hongye,Shi Xiaoyu,Zhou Wen,etc. Coupled Train-Bridge Vibration and Dynamic Characteristics of Long-Span T-Shaped Rigid Frame Railway Bridge[J]. Journal of Southwest Jiaotong University,2018(4):679-686.
[3]袁明.高墩大跨连续刚构桥的车桥系统耦合振动分析[D].长沙:长沙理工大学,2005.Yuan Ming. The Research of Coupling Vibration of Vehicle-bridge in the High-pier&Long-span Continuous Rigid Frame Bridge[D]. Changsha:Changsha University of Technology,2005.
[4]李闻秋.大跨连续刚构桥收缩徐变及温度效应对车桥系统耦合振动的影响[D].成都:西南交通大学,2014.Li Wenqiu. The Influence of Creep-Shrinkage and Temperature Effetc on Coupled Vibration of VehicleBridge System for Long-Span Ccontinuous Rigid Frame Bridge[D]. Chengdu:Southwest Jiaotong University,2014.
[5]张梦楠,胡志鹏,巫裕斌,等.高墩大跨桥梁桥墩升温对桥上无缝线路的影响研究[J].铁道标准设计,2014(9):32-35.Zhang Mengnan, Hu Zhipeng, Wu Yubin, etc.Influence of Pier Temperature Increase on Jointless Track of Large-Span Bridge with High-Pier[D].Railway Standard Design,2014(9):32-35.
[6]黎赫东.基于自回归滑动平均模型与车桥耦合理论的连续刚构桥损伤识别研究[D].武汉:华中科技大学,2016.Li Hedong. Research on Damage Identification of a Continuous Rigid Frame Bridge Based on ARMA Model Combined with Vehicle-bridge Coupling Theory[D].Wuhan:Huazhong University of Science and Technology,2016.
[7] GB/T 5599—1985,铁道车辆动力学性能评定和试验鉴定规范[S].GB/T 5599—1985,Railway Vehicles-Specification for Evaluation the Dynamic Performance and Accreditation Test[S].
[8] TB 10621—2014,高速铁路设计规范[S].TB 10621—2014,Code for Design of High Speed Railway[S].
[9]铁运〔2008〕28号,高速动车组整车试验规范[S].Railway Transport〔2008〕No. 28,Testing of High-speed Electic Multiple Unit on Completion of Construction[S].
[10]国际铁路联盟.铁路车辆内旅客振动舒适性评价准则[R].北京:铁道部标准计量研究所,1998.International Union of Railways. Evaluation Criteria for Vibration Comfort of Passengers in Railway Vehicles[R]. Beijing:Institute of Standard Metrology,Ministry of Railways,1998.
[2]勾红叶,石晓宇,周文,等.铁路大跨T形刚构桥车桥耦合振动与动力性能[J].西南交通大学学报,2018(4):679-686.Gou Hongye,Shi Xiaoyu,Zhou Wen,etc. Coupled Train-Bridge Vibration and Dynamic Characteristics of Long-Span T-Shaped Rigid Frame Railway Bridge[J]. Journal of Southwest Jiaotong University,2018(4):679-686.
[3]袁明.高墩大跨连续刚构桥的车桥系统耦合振动分析[D].长沙:长沙理工大学,2005.Yuan Ming. The Research of Coupling Vibration of Vehicle-bridge in the High-pier&Long-span Continuous Rigid Frame Bridge[D]. Changsha:Changsha University of Technology,2005.
[4]李闻秋.大跨连续刚构桥收缩徐变及温度效应对车桥系统耦合振动的影响[D].成都:西南交通大学,2014.Li Wenqiu. The Influence of Creep-Shrinkage and Temperature Effetc on Coupled Vibration of VehicleBridge System for Long-Span Ccontinuous Rigid Frame Bridge[D]. Chengdu:Southwest Jiaotong University,2014.
[5]张梦楠,胡志鹏,巫裕斌,等.高墩大跨桥梁桥墩升温对桥上无缝线路的影响研究[J].铁道标准设计,2014(9):32-35.Zhang Mengnan, Hu Zhipeng, Wu Yubin, etc.Influence of Pier Temperature Increase on Jointless Track of Large-Span Bridge with High-Pier[D].Railway Standard Design,2014(9):32-35.
[6]黎赫东.基于自回归滑动平均模型与车桥耦合理论的连续刚构桥损伤识别研究[D].武汉:华中科技大学,2016.Li Hedong. Research on Damage Identification of a Continuous Rigid Frame Bridge Based on ARMA Model Combined with Vehicle-bridge Coupling Theory[D].Wuhan:Huazhong University of Science and Technology,2016.
[7] GB/T 5599—1985,铁道车辆动力学性能评定和试验鉴定规范[S].GB/T 5599—1985,Railway Vehicles-Specification for Evaluation the Dynamic Performance and Accreditation Test[S].
[8] TB 10621—2014,高速铁路设计规范[S].TB 10621—2014,Code for Design of High Speed Railway[S].
[9]铁运〔2008〕28号,高速动车组整车试验规范[S].Railway Transport〔2008〕No. 28,Testing of High-speed Electic Multiple Unit on Completion of Construction[S].
[10]国际铁路联盟.铁路车辆内旅客振动舒适性评价准则[R].北京:铁道部标准计量研究所,1998.International Union of Railways. Evaluation Criteria for Vibration Comfort of Passengers in Railway Vehicles[R]. Beijing:Institute of Standard Metrology,Ministry of Railways,1998.
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