高速铁路无缝道岔伤损、劣化机理研究
发布时间：2018-11-19 17:36
【摘要】：目前我国在高速铁路无缝道岔设计理论体系、道岔平面与关键结构、道岔制造、组装、运输、铺设等方面均形成了一系列具有我国自主知识产权的高速道岔技术体系。但缺乏对高速铁路无缝道岔的运营管理经验,对无缝道岔伤损劣化机理以及伤损检测和养护维修技术的研究才刚刚起步,对无缝道岔钢轨磨损、可动轨件矢弯变形、滑床台板脱空后的复杂轮轨关系对列车运行平稳性、安全性的影响规律研究不够深入,对道岔疲劳劣化机理缺乏系统性研究。总体来说,国内在道岔疲劳劣化指标、检测方法和养修方案等方面均存在明显的不足。 本文主要研究无缝道岔伤损及劣化的机理,采用ANSYS和SIMPACK软件对循环温度荷载作用以及循环温度荷载与行车动力耦合作用下道岔的应力与变形情况进行了系统的分析,并与实测数据和已有研究进行对比,验证模型的可靠性和可行性。利用所建立的分析模型,对道岔区伤损及病害的产生机理进行了合理的阐述,并对伤损状态下车-岔动力学性能进行了评估,主要所做工作及所得结论如下： (1)创新性的采用循环温度荷载加载方式对道岔区钢轨在温度荷载下的受力及变形进行了分析,并将这种新型加载方式与既有的整体加载方式条件下的计算结果进行对比,体现利用新型加载方式对道岔伤损及病害机理进行研究的必要性。 (2)对耦合温度场以及行车动力作用下道岔受力及变形进行分析,并对不同行车速度下直向及侧向过岔过程中道岔受力与变形进行了对比。结果表明,耦合温度场的存在对车辆行车动力学效应有较大的影响,存在耦合温度场时,道岔区钢轨垂向位移有所减小,而振动加速度有所增加,钢轨纵向应力也有所增加,各项指标随着车辆运行速度的增加体现出一定程度的增加的趋势。 (3)利用耦合温度场与车-岔动力学分析结果得出岔区病害产生原因,并研究了岔区在存在基本轨、翼轨磨耗以及心轨、尖轨不密贴两种病害情况下车辆通过时的动力学响应并分析了病害劣化的原因。
[Abstract]:At present, China has formed a series of high-speed turnout technology systems with our own intellectual property rights in the aspects of high-speed railway seamless turnout design theoretical system, switch plane and key structure, turnout manufacture, assembly, transportation, laying and so on. However, there is no experience in operation and management of seamless turnout in high-speed railway. The research on damage deterioration mechanism, damage detection and maintenance technology of jointless turnout is just beginning. For the wear of seamless switch rail, the sagittal bending deformation of movable rail, The influence of the complex wheel-rail relationship on train running stability and safety is not deep enough, and the fatigue deterioration mechanism of turnout is not systematically studied. In general, there are obvious deficiencies in fatigue deterioration index, detection method and maintenance scheme of turnout in China. In this paper, the mechanism of the damage and deterioration of seamless turnout is studied. The cyclic temperature load and the stress and deformation of the turnout under the coupling of cyclic temperature load and driving power are analyzed systematically by using ANSYS and SIMPACK software. The reliability and feasibility of the model are verified by comparing with the measured data and existing research. Based on the established analysis model, the mechanism of injury and disease in turnout area is described reasonably, and the dynamic performance of disembarkation in the state of injury is evaluated. The main work and conclusions are as follows: (1) the stress and deformation of rail in turnout area under temperature load are analyzed innovatively by cyclic temperature load loading. The new loading method is compared with the calculation results under the existing integral loading mode, which reflects the necessity of using the new loading mode to study the mechanism of turnout damage and disease. (2) the coupling temperature field and the force and deformation of the turnout under the action of driving force are analyzed, and the stress and deformation of the turnout in the process of straight and lateral crossing under different driving speeds are compared. The results show that the existence of coupling temperature field has a great effect on vehicle driving dynamics. When there is coupling temperature field, the vertical displacement of rail decreases, the vibration acceleration increases, and the longitudinal stress of rail increases. With the increase of vehicle speed, each index reflects the trend of increasing to a certain extent. (3) by using the coupled temperature field and the dynamic analysis of vehicle-turnout, the causes of the fault in the bifurcation zone are obtained, and the existence of the basic rail, the wear of the wing rail and the heart orbit in the bifurcation zone are studied. The dynamic response of vehicles passing through the two diseases is analyzed and the causes of disease deterioration are analyzed.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：U213.6
本文编号：2342967
[Abstract]:At present, China has formed a series of high-speed turnout technology systems with our own intellectual property rights in the aspects of high-speed railway seamless turnout design theoretical system, switch plane and key structure, turnout manufacture, assembly, transportation, laying and so on. However, there is no experience in operation and management of seamless turnout in high-speed railway. The research on damage deterioration mechanism, damage detection and maintenance technology of jointless turnout is just beginning. For the wear of seamless switch rail, the sagittal bending deformation of movable rail, The influence of the complex wheel-rail relationship on train running stability and safety is not deep enough, and the fatigue deterioration mechanism of turnout is not systematically studied. In general, there are obvious deficiencies in fatigue deterioration index, detection method and maintenance scheme of turnout in China. In this paper, the mechanism of the damage and deterioration of seamless turnout is studied. The cyclic temperature load and the stress and deformation of the turnout under the coupling of cyclic temperature load and driving power are analyzed systematically by using ANSYS and SIMPACK software. The reliability and feasibility of the model are verified by comparing with the measured data and existing research. Based on the established analysis model, the mechanism of injury and disease in turnout area is described reasonably, and the dynamic performance of disembarkation in the state of injury is evaluated. The main work and conclusions are as follows: (1) the stress and deformation of rail in turnout area under temperature load are analyzed innovatively by cyclic temperature load loading. The new loading method is compared with the calculation results under the existing integral loading mode, which reflects the necessity of using the new loading mode to study the mechanism of turnout damage and disease. (2) the coupling temperature field and the force and deformation of the turnout under the action of driving force are analyzed, and the stress and deformation of the turnout in the process of straight and lateral crossing under different driving speeds are compared. The results show that the existence of coupling temperature field has a great effect on vehicle driving dynamics. When there is coupling temperature field, the vertical displacement of rail decreases, the vibration acceleration increases, and the longitudinal stress of rail increases. With the increase of vehicle speed, each index reflects the trend of increasing to a certain extent. (3) by using the coupled temperature field and the dynamic analysis of vehicle-turnout, the causes of the fault in the bifurcation zone are obtained, and the existence of the basic rail, the wear of the wing rail and the heart orbit in the bifurcation zone are studied. The dynamic response of vehicles passing through the two diseases is analyzed and the causes of disease deterioration are analyzed.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：U213.6
【参考文献】
相关期刊论文 前10条
1 白冰;;循环温度荷载作用下饱和多孔介质热-水-力耦合响应[J];工程力学;2007年05期
2 任尊松;孙守光;;道岔区轮轨接触几何关系研究[J];工程力学;2008年11期
3 钱立和;刘帅;孟江英;郭鹏程;张福成;;辙叉用高锰钢的循环变形与硬化[J];燕山大学学报;2012年06期
4 罗峗;吴安伟;;动车组与单节车侧向通过道岔动力学性能比较[J];机车电传动;2007年01期
5 罗信伟;雷晓燕;冯青松;刘庆杰;;无缝道岔温度力及变形的有限元分析[J];交通运输工程与信息学报;2007年01期
6 张洲旭;;时速350公里60kg/m钢轨18号高速道岔制造工艺优化[J];山西建筑;2012年16期
7 王兆平;李德忠;;铁路道岔尖轨病害整治和养护方法的改进[J];科技信息;2012年27期
8 宋传懿;;铁路提速道岔病害原因分析与整治[J];科技成果纵横;2011年03期
9 侯爱滨;60kg/m钢轨18号提速道岔研究与设计[J];铁道标准设计;1998年06期
10 车伟;张彦;;60 kg/m钢轨18号(Vz200)可动心轨单开道岔的研制[J];铁道标准设计;2006年S1期
相关博士学位论文 前2条
1 陈嵘;高速铁路车辆—道岔—桥梁耦合振动理论及应用研究[D];西南交通大学;2009年
2 崔圣爱;基于多体系统动力学和有限元法的车桥耦合振动精细化仿真研究[D];西南交通大学;2009年
相关硕士学位论文 前4条
1 李苍楠;基于刚柔耦合联合仿真的高速铁路桥上无砟道岔动力学研究[D];北京交通大学;2011年
2 井国庆;18号可动心轨道岔心轨不足位移仿真分析[D];西南交通大学;2006年
3 李旨远;基于瞬态传热的钢结构抗火设计研究[D];内蒙古科技大学;2009年
4 王伟华;土路基上双块式无砟轨道垂向动力特性分析[D];西南交通大学;2009年
，本文编号：2342967
本文链接：https://www.wllwen.com/falvlunwen/zhishichanquanfa/2342967.html
