高速铁路路桥过渡段不均匀沉降与钢轨变形的映射关系及动力学应用
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摘要
路桥过渡段不均匀沉降对高速车辆的行车安全性及舒适度影响较大.本文研究了路桥过渡段不均匀沉降与钢轨变形的映射关系,并将其应用于分析高速动车通过该区域时的动力学特性.首先,分析了路桥过渡段不均匀沉降引起钢轨变形的机理.然后,建立了铺设有CRTS-Ⅲ型板式轨道的路桥过渡段有限元模型,通过大量计算,分析了高速铁路路桥过渡段不均匀沉降与钢轨变形的映射关系.在此基础上,基于最小二乘多项式拟合原理,得到该映射关系的函数表达.最后,基于车辆-轨道耦合动力学理论,分析了高速动车以不同方向通过路桥过渡段的动力学性能.研究结果表明:路桥过渡段发生不均匀沉降后的钢轨变形可通过函数式进行描述.轮轨垂向力随着过渡段不均匀沉降差的增加变化不明显,车体垂向加速度随着过渡段沉降差的增加而增大.动力学分析结果可为高速铁路路桥过渡段的施工与养护维修提供技术参考.
The uneven settlement of subgrade-bridge transition section has a great influence on the driving safety and comfort of high-speed vehicles. This paper studies the mapping relationship between uneven settlement of subgrade and rail deformation in this section and it has been used to analyze the dynamic characteristics of the high-speed train when it is passing through the transition section. After the mechanism analysis of rail deformation, the subgrade-bridge transition section with CRTS-Ⅲ slab ballastless track is built by finite element method(FEM). Mapping relationship between uneven settlement of subgrade and rail deformation can be obtained by large amounts of calculation. Based on the rail deformation curves from FEM model, the functional expression of the mapping relationship is given using least squares polynomial method. Finally, based on train-track coupled dynamics, the dynamic behaviors of the high speed train are analyzed on different conditions. The results show that there is a mapping relationship between settlement of subgrade and rail deformation, which can be given by a function. The function can describe the rail deformation accurately and reliably in transition section. The uneven settlement amplitude will not influence the wheel and rail force. However, the acceleration of carbody will increase with greater amplitude of settlement. The results of this paper can be the reference to the construction and maintenance of subgrade-bridge transition section.
The uneven settlement of subgrade-bridge transition section has a great influence on the driving safety and comfort of high-speed vehicles. This paper studies the mapping relationship between uneven settlement of subgrade and rail deformation in this section and it has been used to analyze the dynamic characteristics of the high-speed train when it is passing through the transition section. After the mechanism analysis of rail deformation, the subgrade-bridge transition section with CRTS-Ⅲ slab ballastless track is built by finite element method(FEM). Mapping relationship between uneven settlement of subgrade and rail deformation can be obtained by large amounts of calculation. Based on the rail deformation curves from FEM model, the functional expression of the mapping relationship is given using least squares polynomial method. Finally, based on train-track coupled dynamics, the dynamic behaviors of the high speed train are analyzed on different conditions. The results show that there is a mapping relationship between settlement of subgrade and rail deformation, which can be given by a function. The function can describe the rail deformation accurately and reliably in transition section. The uneven settlement amplitude will not influence the wheel and rail force. However, the acceleration of carbody will increase with greater amplitude of settlement. The results of this paper can be the reference to the construction and maintenance of subgrade-bridge transition section.
引文
1陈兆玮,孙宇,翟婉明.高速铁路桥墩沉降与钢轨变形的映射关系(I):单元板式无砟轨道系统.中国科学:技术科学,2014,44:770–777
2 翟婉明.车辆-轨道耦合动力学.第4版.北京:科学出版社,2015
3 Varandas J N,H?lscher P,Silva M A.Settlement of ballasted track under traffic loading:Application to transition zones.P I Mech Eng F-J Rai,2014,228:242–259
4 Lei X Y,Mao L J.Dynamic response analyses of vehicle and track coupled system on track transition of conventional high speed railway.J Sound Vib,2004,271:1133–1146
5 马学宁,梁波.高速铁路无砟轨道路桥过渡段路基动力特性研究.兰州交通大学学报,2012,31:6–10
6 Shan Y,Shu Y,Zhou S H.Finite-infinite element coupled analysis on the influence of material parameters on the dynamic properties of transition zones.Constr Build Mater,2017,148:548–558
7 Banimahd M,Woodward P K,Kennedy J,et al.Behaviour of train-track interaction in stiffness transitions.P I Civil Eng-Transp,2012,165:205–214
8 罗强,蔡英.高速铁路路桥过渡段变形限值与合理长度研究.铁道标准设计,2000,20:2–4
9 罗强,蔡英,翟婉明.高速铁路路桥过渡段的动力学性能分析.工程力学,1999,16:66–70
10 蔡成标,翟婉明,赵铁军,等.列车通过路桥过渡段时的动力作用研究.交通运输工程学报,2001,1:18–19
11 Paix?o A,Fortunato E,Cal?ada R.A numerical study on the influence of backfill settlements in the train/track interaction at transition zones to railway bridges.P I Mech Eng F-J Rai,2016,230:866–878
12 翟婉明,赵春发.现代轨道交通工程科技前沿与挑战.西南交通大学学报,2016,51:211–212
13 Momoya Y,Takahashi T,Nakamura T.A study on the deformation characteristics of ballasted track at structural transition zone by multi-actuator moving loading test apparatus.Transp Geotech,2016,6:123–134
14 Chen Z W,Zhai W M,Yin Q.Analysis of structural stresses of tracks and vehicle dynamic responses in train-track-bridge system with pier settlement.P I Mech Eng F-J Rai,2018,232:421–434
15 Chen Z W,Zhai W M,Tian G Y.Study on the safe value of multi-pier settlement for simply supported girder bridges in high-speed railways.Struct Inf Eng,2018,14:400–410
16 赵国堂.高速铁路无砟轨道—路基变形计算模型的研究.中国铁道科学,2016,37:3–4
2 翟婉明.车辆-轨道耦合动力学.第4版.北京:科学出版社,2015
3 Varandas J N,H?lscher P,Silva M A.Settlement of ballasted track under traffic loading:Application to transition zones.P I Mech Eng F-J Rai,2014,228:242–259
4 Lei X Y,Mao L J.Dynamic response analyses of vehicle and track coupled system on track transition of conventional high speed railway.J Sound Vib,2004,271:1133–1146
5 马学宁,梁波.高速铁路无砟轨道路桥过渡段路基动力特性研究.兰州交通大学学报,2012,31:6–10
6 Shan Y,Shu Y,Zhou S H.Finite-infinite element coupled analysis on the influence of material parameters on the dynamic properties of transition zones.Constr Build Mater,2017,148:548–558
7 Banimahd M,Woodward P K,Kennedy J,et al.Behaviour of train-track interaction in stiffness transitions.P I Civil Eng-Transp,2012,165:205–214
8 罗强,蔡英.高速铁路路桥过渡段变形限值与合理长度研究.铁道标准设计,2000,20:2–4
9 罗强,蔡英,翟婉明.高速铁路路桥过渡段的动力学性能分析.工程力学,1999,16:66–70
10 蔡成标,翟婉明,赵铁军,等.列车通过路桥过渡段时的动力作用研究.交通运输工程学报,2001,1:18–19
11 Paix?o A,Fortunato E,Cal?ada R.A numerical study on the influence of backfill settlements in the train/track interaction at transition zones to railway bridges.P I Mech Eng F-J Rai,2016,230:866–878
12 翟婉明,赵春发.现代轨道交通工程科技前沿与挑战.西南交通大学学报,2016,51:211–212
13 Momoya Y,Takahashi T,Nakamura T.A study on the deformation characteristics of ballasted track at structural transition zone by multi-actuator moving loading test apparatus.Transp Geotech,2016,6:123–134
14 Chen Z W,Zhai W M,Yin Q.Analysis of structural stresses of tracks and vehicle dynamic responses in train-track-bridge system with pier settlement.P I Mech Eng F-J Rai,2018,232:421–434
15 Chen Z W,Zhai W M,Tian G Y.Study on the safe value of multi-pier settlement for simply supported girder bridges in high-speed railways.Struct Inf Eng,2018,14:400–410
16 赵国堂.高速铁路无砟轨道—路基变形计算模型的研究.中国铁道科学,2016,37:3–4