Prediction and Control of Wheel/Rail Noise for Rail Transit(Abstract of the Ph.D.Dissertation)

On the basis of the theory of vehicle-track coupling dy-namics and noise radiation and propagation,a model ofwheel/rail noise prediction for the rail transit is founded andthe software for wheel/rail noise prediction is developed.Inthe model,the wheel is …     

Research on the Influence of Vertical Deformation of Bridge on the Track RegularityEI北大核心

Research purposes: The vertical deformation of high-speed railway (HSR) bridge will cause the track irregularity, which threatens the safe and efficient operation of the HSR. Taking the 32 m simple supported beam bridge as the research object, based on the existing mapping analytical model for bridge vertical deformation and rail geometry, the influence of the track regularity of the CRTS Ⅰ slab ballastless track structure caused by the key parameters such as the bridge vertical deformation amplitude, the hanging length of the beam end and the vertical stiffness of mortar layer were studied, and the corresponding measures to control the rail deformation were proposed, to provide theoretical reference for comprehensive treatment of rail deformation of HSR bridge. Research conclusions:(1) The pier settlement, the vertical rotation of the beam end and the beam fault will cause the rail to follow the beam deformation, and "up-warping" of the rail on the vertical deformation boundary will appear. (2) The rail deformation is directly proportional to the vertical deformation amplitude of the bridge and the key to control the rail deformation is to reduce the vertical deformation of the bridge. (3) The rail deformation can be controlled by reducing the hanging length of beam and vertical stiffness of mortar layer. (4) The research results can provide a theoretical reference for controlling the vertical rail deformation of high-speed railway bridges. © 2018, Editorial Department of Journal of Railway Engineering Society. All right reserved.     

ABSTRACTS

Applying the Scientific Outlook on Development to Promote the Construction of Urban Rail Transit
-C Thinking on Current Construction Development of China Urban Rail Transit Jiao Tongshan 1
The construction of China Urban Rail Transit is now staying in the important time with rapid development. The achievements we obtained are objectively summarized. At the same time, the contradiction between the current construction speed and preliminary work, the construction procedure, the phenomena of despising operation, the unified planning of traffic integration, the control of construction standards, the difference of fare in domestic urban rail transit, as well as the enhancement of government management for urban rail transit are analyzed and investigated through some phenomena in the industry. Several suggestions are also presented.     

ABSTRACTS

Security Technology of Japan Shinkansen Railway Yu Zhanyou 1
The operation record with zero mortality of Japan Shinkansen for 45 years is based on their management idea of ＂safety first＂, strong disaster prevention awareness, advanced and mature technology but not pursuing the most advanced guiding ideology, a set of legal procedures, the severe technology certification system, the accurate traffic control system, the strict overhaul system, as well as the examination and maintenance system. In this paper, the successful experiences of Japan Railway are introduced and summarized, which have important references for safety guarantee of China urban rail transit industry.     

电气化铁道专业常用英汉词汇汇编（13）

head–span pole软横跨支柱head–span structure软横跨head–span support横承力索支撑head–span wire横承力索head wire横承力索headroom净空高度headroom restriction净空限制headspan横跨headspan construction横跨结构,横跨headspan cross catenary wire软横跨承力索head     

地铁建设工程中TBM中板步进过站技术

为研究隧道掘进机(TBM)从施作好的地铁车站中板上整体步进过站的技术,依托重庆地铁6号线工程,设计"弧底导轨"TBM中板步进过站方案和车站中板加固方案;通过数值模拟实际工况和对施工过程的监测,验证设计方案的合理性。结果表明:TBM中板步进过站时,采用"弧底导轨"方案合理可行;在弧形导台沿TBM步进方向设置上翻梁以及梁下设置钢支撑体系,可保证TBM过站时中板结构的安全;中板结构受TBM荷载影响的范围主要集中在TBM机头作用点前方10m至后支撑作用点间的27m区域内;"弧底导轨"可有效地将TBM自重荷载传递给钢支撑体系和底板,确保中板结构的安全;车站中板内的上翻梁和梁下的钢支撑体系加强了中板结构的整体刚度,减小了变形开裂,保证了TBM过站后地铁车站的安全运营。     

长床身导轨调平时的检测要点

分析总结了长床身导轨在调平时的精度要求、基准的选定、直线度的检测以及检验桥板的选用等要点，明确床身导轨调平时的概念，以指导生产现场长床身导轨调平时的检测。     

胶轮导轨电车整车结构形式研究

在现有胶轮导轨电车的整车结构形式的基础上,提出一种新型M+T+M的3模块编组形式,并对空气弹簧数量对车体与走行部位置变化影响、减振器影响、轴桥铰接方式进行研究。计算结果表明:2个空气弹簧的支撑模式在出曲线时的波动幅值及收敛时间上高于4个空气弹簧的支撑模式;通过在车体与走行部之间添加减振器能够较好地降低2个空气弹簧支撑模式下的波动幅值和收敛时间;在使用4个空气弹簧时两轴桥通过转动铰连接表现出较好性能,当使用2个空气弹簧时使用固定铰连接性能更佳。     

导轨式胶轮电车车辆基地工艺特点

介绍了导轨式胶轮电车功能定位,基于天津滨海和上海张江两条试验线的运用情况,从检修工艺、检修制度等方面,分析导轨式胶轮电车检修工艺的特点,为导轨式胶轮电车车辆基地的设计提供参考。     

6m导轨磨床技术改造

针对机床导轨磨削表面发生的质量问题进行分析，得知导轨磨床横梁升降速度太快、立磨头主轴角度不符合磨削技术要求的具体原因，确定设计蜗轮减速箱、立磨头微调机构，有效地保证大修机床导轨磨削平面的表面质量技术要求。