Analysis of train derailment after hitting the pier of tongling yangtze river bridge combined road with railwayEI北大核心

Research purposes: Precise prediction for mechanical behavior of the bridge under ship collision force is important to assess the analysis of train derailment after hitting the pier. This paper focuses on the Tongling Yangtze River Bridge Combined Road with Railway for ship collision simulation, uses the nonlinear finite element software of ANSYS/LS-DYNA to simulate the ship's bow section of 10000 t and 5000 t class hitting bridge tower column at front and axle to 20° of side in highest navigable water level, conventional navigable water level and the minimum navigable water level. Curves of collision force-period at different working conditions are summarized. On this basis, when the impact load affects as input loads, the displacement and acceleration response can be used by finite element analysis under the collision and study the dynamic response of the bridge caused by a train derailment risk. Research conclusions: (1) The impact force of the bridge is largest when a laden ship is hitting the pier at the highest navigable water level. In the most unfavorable condition, the collision have lardge impact on bridge structure and derailment risk of trains. (2) The transverse acceleration of the girder on the top of 2# pier can reach to 0.922 m/s2, but it does not exceed acceleration excitation limit (1 m/s2) when 3# piers are hitted by the 10000 t ship at the peak load of collision, so the probability of train derailment is minimal. (3) Based on the probability formula of the derailment by simplifying risk criteria, the derailment probability of train is 9×10-5~1.5×10-4 during the ship-bridge collision. (4) The research results can provide the reference for train traffic safety on railway bridge caused by ship collisions.     

Thoughts on Transferring Traditional Operation to Full-process Logistic Service

Through expounding the methods of Guiyang South Station transferring to full-process logistic service such as exerting transport market by transferring mechanism, integrating station with dedicated line as to create special market, trying to create brand of full-process transportation, and convoying loading and transportation by jointless connection and ＂front-shop and back workshop＂, based on analyzing ＂three obvious items＂ and ＂three deficiencies＂ existing in practice, this paper puts forward the measures of transferring to the full-process logistic service in further step, such as organizing self-supporting train fleet and mastering market initiative; optimizing price mechanism and adapting for market demand; well building logistic port depending on changed center; and increasing hardware level and strengthening the capacity of freight yard.     

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

Strengthen Security Management to Ensure Consistent and Stable Freight Transporta- tion By Adopting and implementing ＂Being High-standard, Scientific and Consistent＂
SU Shun-hu （Transportation Bureau, MOR, Beijing 100844, China）
Abstract： After reviewing the work that has been done this year in aspect of railway freight transport safety, in light of the strategic deployment of the MOR Party Group and requirements of ＂being high standard, scientific and consistent＂, the author deeply analyses the severe situations that are facing upon China Railways and puts forth a series of requirements in this regard, to be briefly speaking, to strengthen the basis for freight transport for improvement of security management level in an all around way; to further enhance construction of freight transport security system for technical backup of safety management; to carry out safety special project management for elimination of outstanding safety problems; to enhance co-management among different departments; to go ahead with key projects for guarantee of consistent and stable transport safety.
Key words： Railway; Freight Transport Safety; Management     

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.     

勘误

<正>《铁道机车车辆》2015年第1期英文摘要倒数第8行"unit join"与"difference"之间遗漏一段。应予增补如下:efforts on level-straight line of all operative conditions for train traction calculation.Owing to the给大家带来的不便谨请谅解!     

ABSTRACTS

Practice and Revelation of Tianjin Freight Transport Center Developing Beijing-Tianjin-Hebei Freight Express Operation
SUN Yan-sheng （Tianjin Freight Transport Center, Beijing Railway Administration, Tianjin 300142, China）
Abstract： This paper summarizes the development of Beijing-Tianjin-Hebei freight express operation of Tianjin Freight Transport Center from aspects of delivery volume and transport revenue, main client base, rate of average freight transport revenue and average operation route respectively, then, from aspects of transport products, marketing mode, price system and service mode, the paper expounds the practice and innovation of Beijing- Tianjin-Hebei freight express operation developed by Tianjin Freight Transport Center. In the end, from 3 aspects of transport product, marketing system and transport price, the paper puts forward the revelation of practice of the express on Chinese railway developing bulk white goods transport market.
Key Words： Railway; Freight Express; Service; Price; Marketing     

ABSTRACTS

Innovation and Practice of Freight Transport Organization Mode in Suihua Car Depot
WU Zhong-kai（Suihua Car Depot, Harbin Railway Administration, Suihua 152000, Heilongjiang, China）
Abstract： Based on analyzing freight transport status of Suihua Car Depot in Harbin Railway Administration, targeting with status of the car depot and problems existing in traditional freight transport organization mode, the operation flow of freight transportation is re-established from 4 aspects of locomotive assembly, territorial transportation, inland organization and shipments arrangement. In the end, according to the freight transport innovation and practice of Suihua Car Depot, this paper puts forward suggestions on increasing innovation of railway freight transport organization mode, such as exerting advantages of resource, realizing win-win between railway freight transportation and clients and enhancing service aim. Key Words： Suihua Car Depot; Freight Transport Organization; Innovation; Operation Flow     

Study on horizontal and vertical temperature gradient of ballastless track on curve lineEI北大核心

Research purposes: In order to get the time-varying rules of temperature field distribution in the track structure with superelevation and build the horizontal and vertical temperature gradient of ballastless track, a continuous observation of CRTS II; by using temperature sensors on curve segment of a passenger dedicated line was held. Research conclusions: (1) The temperature change of ballastless track between daytime and nighttime is big, the temperature changing value of surface was 24.7℃ in maximum, 19℃ in average. (2) The temperature changing value became small and the time of maximum temperature come late with the increase of distance to surface. (3) At the bottom of the track structure, the temperature changing value was 6.1℃ in maximum, 5.0℃ in average. (4) Fitting curve of vertical temperature gradient of longitudinally connected ballastless track on curve line can be exponential curve, and the curve sharp can match the distribution about the vertical temperature gradient of the code for design of bridge and culvert in China. (5) The horizontal temperature gradient of the CRTS II; longitudinally connected ballastless track included the track slab and support layer, temperature gradient of track slab could be fitted by using quadratic function, temperature gradient of support layer could be fitted by using piecewise linear function. (6) This study can provide guidance for the temperature load model in the design of high speed railway in central China.     

英文摘要

Service System and Marketing Strategy of Railway Freight Transport
Guo Yu-hua （Bureau of Transport, MOR, Beijing 100844, China）
Abstract： By using theories of service system and service marketing system, the author analyzes railway freight service system and the railway freight marketing system, and also the strategy in railway freight marketing system. It is suggested that railway freight should establish the marketing strategy with comparative advantages of technical sources and organizational sources, and also the market development strategy that could convert source advantages into market power.     

英文摘要

Technical Points and Revision in Implementation of GB ＇Passenger Transport Service Marks of Urban Rail Transit＇,Comparison and Analysis of Transmission Techniques of Communication System in Urban Rail Transit ,Analysis on Setting Scheme of Control Center with Network Operation in Urban Rail Transit     

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