scholarly journals Optimizing Train-Set Circulation Plan in High-Speed Railway Networks Using Genetic Algorithm

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Yun Wang ◽  
Yu Zhou ◽  
Xuedong Yan
Keyword(s):  
Genetic Algorithm ◽  
High Speed ◽  
Sustainable Transportation ◽  
Utilization Efficiency ◽  
Practical Significance ◽  
Railway Transportation ◽  
High Speed Railway ◽  
Utilization Scheme ◽  
The One ◽  
New Research

As a sustainable transportation mode, high-speed railway (HSR) has been developing rapidly during the past decade in China. With the formation of dense HSR network, how to improve the utilization efficiency of train-sets (the carrying tools of HSR) has been a new research hotspot. Moreover, the emergence of railway transportation hubs has brought great challenges to the traditional train-sets’ utilization mode. Thus, in this paper, we address the issue of train-sets’ utilization problem with the consideration of railway transportation hubs, which consists of finding an optimal Train-set Circulation Plan (TCP) to complete trip tasks in a given Train Diagram (TD). An integer programming TCP model is established to optimize the train-set utilization scheme, aiming to obtain the one-to-one correspondence relationship among sets of train-sets, trip tasks, and maintenances. A genetic algorithm (GA) is designed to solve the model. A case study based on Nanjing and Shanghai HSR transportation hubs is made to demonstrate the practical significance of the proposed method. The results show that a more efficient TCP can be formulated by introducing train-sets being dispatched among different stations in the same hub.

scholarly journals Selecting an Appropriate Express Railway Pavement System Using VIKOR Multi-Criteria Decision Making Model

2018 ◽  
Vol 4 (5) ◽  
pp. 1104
Author(s):  
Amin Nejati ◽  
Mehdi Ravanshadnia ◽  
Ehsan Sadeh
Keyword(s):  
High Speed ◽  
Sustainable Transportation ◽  
Railway Transportation ◽  
High Speed Railway ◽  
Passenger Transportation ◽  
The Social ◽  
Social And Economic Development ◽  
Decision Making Model ◽  
Selection Of ◽  
High Speed Railroad

A gigantic evolution has been brought about in the railway transportation by the emergence of the expressways as the most efficient method of carrying passengers within short and medium interurban distances. Various types of expressway pavements have been offered during the recent years. A considerable amount of the repair and maintenance costs in railroad sector is allocated to the constituents forming the pavements. No thorough and precise research has been so far conducted on the railroad expressways featuring traffics with speeds over 250 km/h and the extant information have merely been trivial changes in the procedures existent for speeds below 200 km/h and these are not deemed of much use and applicability. Thus, the current research paper is devoted to the investigation and selection of express railways pavement system design using VIKOR method. The evaluations indicate that the commencement of the first high-speed train work in 1964 in Japan marked a turning point in the railroad passenger transportation in the world. The development of the high-speed railway transportation is enumerated as an important revolution helping the railroads retake their crucial role in passenger transportation in such a way that it is found overtaking the roadway and aerial transportation and even exposing some airlines to real crisis. The high-speed railroad is undergoing an intensive expansion worldwide and as a safe, sound and sustainable transportation system, it has well proved its role in the social and economic development of the nations.

scholarly journals Monitoring and Modeling Railway Structures on High-Speed Lines with Asphalt Concrete Underlay: A Study on the Bretagne–Pays de la Loire Line

2020 ◽  
Vol 2674 (12) ◽  
pp. 600-607
Author(s):  
Diana Khairallah ◽  
Olivier Chupin ◽  
Juliette Blanc ◽  
Pierre Hornych ◽  
Jean-Michel Piau ◽  
...  
Keyword(s):  
Asphalt Concrete ◽  
High Speed ◽  
Large Scale ◽  
Strain Gages ◽  
Railway Transportation ◽  
Dynamic Stresses ◽  
High Speed Railway ◽  
High Frequencies ◽  
High Acceleration ◽  
High Speed Trains

The design and durability of high-speed railway lines is a major challenge in the field of railway transportation. In France, 40 years of feedback on the field behavior of ballasted tracks led to improvements in the design rules. However, the settlement and wear of ballast, caused by dynamic stresses at high frequencies, remains a major problem on high-speed tracks leading to high maintenance costs. Studies have shown that this settlement is linked to the high acceleration produced in the ballast layer by high-speed trains traveling on the track, disrupting the granular assembly. The “Bretagne–Pays de la Loire” high-speed line (BPL HSL), with its varied subgrade conditions, represents the first large-scale application of asphalt concrete (GB) as the ballast sublayer. This line includes 77 km of conventional track with a granular sublayer of unbound granular material (UGM) and 105 km of track with an asphalt concrete sublayer under the ballast. During construction, instruments such as accelerometers, anchored deflection sensors, and strain gages, among others, were installed on four sections of the track. This paper examines the instrumentation as well as the acquisition system installed on the track. The data processing is explained first, followed by a presentation of the ViscoRail software, developed for modeling railway tracks. The bituminous section’s behavior and response is modeled using a multilayer dynamic response model, implemented in the ViscoRail software. A good match between experimental and calculated results is highlighted.

scholarly journals A discussion on technologies for improving the operational speed of high-speed railway networks

2019 ◽  
Vol 1 (1) ◽  
pp. 22-36 ◽  
Author(s):  
Chun-fang Lu
Keyword(s):  
High Speed ◽  
Rapid Development ◽  
Practical Significance ◽  
Railway Network ◽  
High Speed Railway ◽  
Development Status ◽  
Improvement Plan ◽  
Railway System ◽  
Traction Power Supply ◽  
Traction Power

Abstract: China’s high-speed railway network has already achieved speeds of 350 km/h; however, this could be further increased to 400 km/h. After considering the development status and technical level of the high-speed railway system in China, this study indicates that there are four key technologies involved in improving its operational speed: the track, the electrical moving unit, the control system and the traction power supply. Through an experimental analysis, an evaluation index for the high-speed railway is then constructed based on four aspects: safety, comfort, intelligence and environmental protection. Using this system, the rationality of the high-speed railway speed-improvement plan can be scientifically evaluated. The results are of practical significance to the Chinese railway administration, as they can be used to formulate specific plans to increase rail speeds, and therefore promote the rapid development of the high-speed railway network in China.

scholarly journals An Empirical Study on the Comprehensive Optimization Method of a Train Diagram of the China High Speed Railway Express

2019 ◽  
Vol 11 (7) ◽  
pp. 2141
Author(s):  
Xueqiao Yu ◽  
Maoxiang Lang ◽  
Wenhui Zhang ◽  
Shiqi Li ◽  
Mingyue Zhang ◽  
...  
Keyword(s):  
Sustainable Development ◽  
High Speed ◽  
Railway Transportation ◽  
Railway Network ◽  
High Speed Rail ◽  
High Speed Railway ◽  
Logistics Industry ◽  
The Sustainable Development ◽  
Express Train ◽  
Multiple Units

The rapid and stable development of China’s economy has driven the increasing demand for express transportation. Based on network operation, China Railway Corporation of High-speed Railway launched high-speed rail products, which have attracted wide attention from all walks of life. With the application of high-speed express trains, the market structure of express transportation in China will change dramatically, from highways as the main mode of transportation to high-speed railway transportation relying on a high-speed railway network, which will effectively reduce the environmental pollution caused by express transportation and further improve the sustainable development of the economy and the logistics industry. At present, the freight Electric Multiple Units (EMU) has been successfully developed and has entered the final test stage. In the last paper, we have introduced the theory and method of the high-speed rail express train operation plan. In addition, a train diagram is an important foundation of railway transportation organization. In order to ensure the sustainable development of high-speed rail express trains after they are put into use, based on the operation plan of high-speed rail express trains, this paper establishes a comprehensive compilation model of a high-speed rail express train diagram, considering train running time, freight flow distribution scheme, and the operation plan of freight multiple units, and an exact solution algorithm based on the Lagrange relaxation algorithm is designed. The computational results are encouraging and demonstrate the effectiveness of the model and solution method.

Performance of Transportation Systems during the 2004 Niigata Ken Chuetsu, Japan, Earthquake

2006 ◽  
Vol 22 (1_suppl) ◽  
pp. 111-132 ◽  
Author(s):  
Scott A. Ashford ◽  
Yohsuke Kawamata
Keyword(s):  
High Speed ◽  
Ground Motions ◽  
Highway Bridges ◽  
Transportation Systems ◽  
Bridge Structure ◽  
Railway Transportation ◽  
High Speed Railway ◽  
Significant Damage ◽  
Emergency Vehicles ◽  
Epicentral Region

With the possible exception of the Shinkansen railway, transportation structures for the most part performed well in the Niigata Ken Chuetsu earthquake. There were no collapses. The damage appeared limited and repairable, indicating generally good performance despite the severe ground motions in the epicentral region. The reconnaissance team visited every bridge structure crossing the Uono and Shinano rivers in the epicentral region. All but two of the highway bridges inspected were open for at least limited traffic, and those two appeared to be open for emergency vehicles. Significant damage was observed on the Shinkansen high-speed railway, as well as on some local railway lines, but all appeared repairable. A historic first was the earthquake's derailment of a high-speed Shinkansen train.

Identification of the Dynamic Load Supplied on Top Pier of High Speed Railway Bridge

2013 ◽  
Vol 831 ◽  
pp. 348-353
Author(s):  
Ya Ping Li ◽  
Meng Yang
Keyword(s):  
Dynamic Load ◽  
High Speed ◽  
Transverse Direction ◽  
Traffic Load ◽  
Railway Bridge ◽  
Load History ◽  
Railway Transportation ◽  
High Speed Railway ◽  
Vibration Load ◽  
Acceleration History

With the development of railway transportation, the traffic load increased continuously and it had the adverse effect on the system of pier-foundation. The quantitative analysis of the load supplied on the top pier is necessary for analyzing the dynamic response of pier-foundation system. Based on the theory of vibration inverse analysis and finite element method, the paper identified the dynamical load supplied on the top pier in vertical and the transverse direction. Combined with the vibration and acceleration history measured by the field test in Xiaolinhe Bridge, the vertical and transverse direction vibration-load history curves were calculated when the train speeds were 153 km/h and 206 km/h respectively. The results indicated that the amplitude of dynamic load increased with the higher speed of train.

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