scholarly journals High Speed Train Rescheduling Based on an Improved Triangle Differential Algorithm

2016 ◽  
Vol 3 (1) ◽  
pp. 15
Author(s):  
Wenjing Deng
Keyword(s):  
High Speed ◽  
High Efficiency ◽  
Real Data ◽  
High Speed Train ◽  
Font Size ◽  
Total Delay ◽  
High Speed Railway ◽  
Train Rescheduling ◽  
High Speed Trains ◽  
Differential Algorithm

<p style="margin: 0cm 0cm 0pt; line-height: 150%;"><span style="font-family: Times New Roman;"><span style="line-height: 150%; font-size: 12pt; mso-bidi-font-family: 'Times New Roman';" lang="EN-US">To reduce the total delay time of the high speed trains and produce high quality timetable, this paper establishes a model of the train rescheduling of high-speed railway, describing the related concepts of high speed train rescheduling with matrices. It takes the track number, operation intervals, train dwelling time at stations as constraints, the sum delayed time at all the stations as the operation goal to construct the model of train rescheduling on high speed railway. Based on the analysis of differential strategy of difference algorithm of, it proposes the differential algorithm for high speed</span><span style="line-height: 150%; font-size: 12pt; mso-bidi-font-family: 'Times New Roman';" lang="EN-US">train rescheduling based on triangle differential strategy and presents the steps of the algorithm. It proves the model effectiveness and the high efficiency and precision of the algorithm with the real data from Beijing-Guangzhou high speed railway. The method for the high speed train rescheduling based on the differential strategy presented in this paper is reasonable and feasible.</span></span></p>

The Vibration Response Analysis about High-Speed Train’s Braking Wing

2012 ◽  
Vol 226-228 ◽  
pp. 102-105
Author(s):  
Wen Qing Zhu ◽  
Yang Yong Zhu
Keyword(s):  
Finite Element ◽  
High Speed ◽  
Rapid Development ◽  
Response Analysis ◽  
High Speed Train ◽  
High Speed Railway ◽  
Emergency Braking ◽  
Finite Element Software ◽  
High Speed Trains ◽  
Aerodynamic Brake

With the rapid development of high-speed railway in China, the aerodynamic brake is very likely to be an important emergency braking mode of high-speed train in the future. This paper takes aerodynamic braking wing as the object, and uses the finite element software to divide the meshes, then analyses the model influenced by static stress. After simulating the vibratory frequency response of the model in the flow field, it finds that the largest deformation happens in the middle of the upper edge of the wind wing, when the wind speed gets to 500km/h and the load frequency to 4Hz. Some conclusions of this thesis can provide reference for researching the applying the aerodynamic brake in the high-speed trains and laying the foundation for solving the riding and braking safety problems.

scholarly journals Optimization Based High-Speed Railway Train Rescheduling with Speed Restriction

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Li Wang ◽  
Wenting Mo ◽  
Yong Qin ◽  
Fei Dou ◽  
Limin Jia
Keyword(s):  
Decision Support ◽  
High Speed ◽  
Lower Layer ◽  
Network Capacity ◽  
Total Delay ◽  
Railway Network ◽  
High Speed Railway ◽  
Capacity Evaluation ◽  
Decision Support Framework ◽  
Train Rescheduling

A decision support framework with four components is proposed for high-speed railway timetable rescheduling in case of speed restriction. The first module provides the speed restriction information. The capacity evaluation module is used to evaluate whether the capacity can fulfill the demand before rescheduling timetable based on deduction factor method. The bilayer rescheduling module is the key of the decision support framework. In the bilayer rescheduling module, the upper-layer objective is to make an optimal rerouting plan with selected rerouting actions. Given a specific rerouting plan, the lower-layer focuses on minimizing the total delay as well as the number of seriously impacted trains. The result assessment module is designed to invoke the rescheduling model iteratively with different settings. There are three prominent features of the framework, such as realized interaction with dispatchers, emphasized passengers’ satisfaction, and reduced computation complexity with a bilayer modeling approach. The proposed rescheduling model is simulated on the busiest part of Beijing to Shanghai high-speed railway in China. The case study shows the significance of rerouting strategy and utilization of the railway network capacity in case of speed restriction.

Brake Distance Calculation of CRH

2013 ◽  
Vol 380-384 ◽  
pp. 201-204 ◽  
Author(s):  
Xu Peng ◽  
Ying Ying Zhou ◽  
Qian Yong Li ◽  
Xiao Qiong He
Keyword(s):  
Traditional Method ◽  
High Speed ◽  
Real Data ◽  
High Speed Train ◽  
Railway Transportation ◽  
High Speed Railway ◽  
Distance Calculation ◽  
Braking Distance ◽  
Real Value ◽  
Existing Data

With the development of high-speed railway in China, CRH is widely used in railway transportation. Traditional method of braking distance calculation is not suitable for CRH. In this paper, a more accurate brake distance of CRH locomotive has been calculated by using the calculus form of the kinematics formulas and verified by real data. Compared with existing data, the authenticity of this calculation is notable. The result is of real value for the researches about high speed train and it makes the control of CRH more accurate.

Integrated Overnight Train Scheduling and Maintenance Planning for High-Speed Railway Lines

2020 ◽  
pp. 036119812096883
Author(s):  
Dian Wang ◽  
Shuguang Zhan ◽  
Qiyuan Peng ◽  
Wentao Zhou
Keyword(s):  
High Speed ◽  
Programming Model ◽  
Mixed Integer ◽  
Maintenance Planning ◽  
High Speed Train ◽  
High Speed Railway ◽  
Train Scheduling ◽  
Railway Line ◽  
High Speed Trains ◽  
Commercial Solver

Overnight high-speed trains are very popular and convenient for passengers in countries with a large territory like China. However, the overnight high-speed train operation inevitably conflicts with the regular evening maintenance. We focus on both overnight high-speed train scheduling and maintenance planning to eliminate the conflict. Because some of the daytime high-speed trains that run early in the morning or late in the evening also interact with overnight high-speed trains and maintenance, we also allow them to be to slightly rescheduled to improve both the quality of the overnight train timetable and the maintenance plan. Our integrated optimization problem is formulated as a mixed integer linear programming model, which can be solved efficiently by the commercial solver CPLEX. Finally, we validate our model on a large real-world case constructed based on the Beijing–Guangzhou high-speed railway line in China.

scholarly journals Dispatching High-Speed Rail Trains via Utilizing the Reverse Direction Track: Adaptive Rescheduling Strategies and Application

2019 ◽  
Vol 11 (8) ◽  
pp. 2351
Author(s):  
Sairong Peng ◽  
Xin Yang ◽  
Hongwei Wang ◽  
Hairong Dong ◽  
Bin Ning ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Numerical Experiments ◽  
High Speed ◽  
Evaluation Criterion ◽  
Reverse Direction ◽  
Total Delay ◽  
High Speed Rail ◽  
High Speed Railway ◽  
Performance Evaluation Criterion ◽  
Train Rescheduling

This paper studies the train rescheduling problem on high-speed railway corridor in the situation where contingencies occur and lead to sudden deceleration of some trains. First, we develop an adaptive rescheduling strategy (AR-S) which allows normal trains to use reverse direction track to overtake front decelerating trains based on delay comparison under different path choices. Second, the traditional rescheduling strategy (TR-S) which does not allow any trains to switch tracks is mentioned as a sharp contrast to AR-S. Furthermore, a performance evaluation criterion is designed to evaluate the effectiveness of the train rescheduling approaches. Finally, numerical experiments carried out on Beijing-Tianjin intercity high-speed railway show that AR-S can reduce the total delay of trains up to 24% in comparison with TR-S.

scholarly journals Proposals for the design of overhead bridge span superstructures in view of the resonance phenomena on the Moscow – Petersburg High-Speed Railway

2021 ◽  
Vol 2021 (2) ◽  
pp. 242-250
Author(s):  
Vladimir N. SMIRNOV ◽  
◽  
Leonid K. D’YACHENKO ◽  
Keyword(s):  
High Speed ◽  
Practical Importance ◽  
Primary Resonance ◽  
High Speed Train ◽  
High Speed Railway ◽  
Bridge Span ◽  
Resonance Phenomena ◽  
High Speed Trains ◽  
Design Solutions

Objective: To develop proposals for designing the infrastructure of the Moscow – Petersburg High- Speed Railway (HSR) in view of the resonance patterns defined by the design solutions of the overhead bridge span superstructures. Methods: The HSR bridge project designs have been analyzed. Results: Proposals have been developed to account for the resonance patterns of high-speed trains movement along overhead bridge span superstructures designed by Mosgiprotrans JSC. Practical importance: The developed proposals make it possible to prevent the primary resonance during high-speed train movement along the HSR with superstructures designed by Mosgiprotrans JSC.

Study Platform for AC Transmission System of High-Speed Train

2012 ◽  
Vol 260-261 ◽  
pp. 505-510
Author(s):  
Xiao Chun Fang ◽  
Zhong Ping Yang ◽  
Fei Lin ◽  
Jin Fei Qin
Keyword(s):  
Energy Saving ◽  
Temperature Rise ◽  
High Speed ◽  
Rapid Development ◽  
Transmission System ◽  
High Speed Train ◽  
High Speed Railway ◽  
High Speed Trains ◽  
System Temperature ◽  
Ac Transmission

Demand for CRH (China Railways High-Speed) trains, both in quantity and types, is increasing because of the rapid development of high-speed railway in China. To support the improvement and development the AC transmission system of these trains, a study platform is proposed in this paper. Target of the platform is supporting the study which contains design, verification, display etc. in detail. Platform framework is described in this paper. And the results of study on transmission system temperature rise and energy-saving operation strategy of high-speed train based on the platform are displayed. Availability of the study platform is verified.

scholarly journals A Fuzzy Optimization Model for High-Speed Railway Timetable Rescheduling

2012 ◽  
Vol 2012 ◽  
pp. 1-22 ◽  
Author(s):  
Li Wang ◽  
Yong Qin ◽  
Jie Xu ◽  
Limin Jia
Keyword(s):  
Optimization Model ◽  
High Speed ◽  
Fuzzy Optimization ◽  
Soft Constraints ◽  
Accurate Approximation ◽  
Total Delay ◽  
High Speed Rail ◽  
High Speed Railway ◽  
Tolerance Approach ◽  
Rail Line

A fuzzy optimization model based on improved symmetric tolerance approach is introduced, which allows for rescheduling high-speed railway timetable under unexpected interferences. The model nests different parameters of the soft constraints with uncertainty margin to describe their importance to the optimization purpose and treats the objective in the same manner. Thus a new optimal instrument is expected to achieve a new timetable subject to little slack of constraints. The section between Nanjing and Shanghai, which is the busiest, of Beijing-Shanghai high-speed rail line in China is used as the simulated measurement. The fuzzy optimization model provides an accurate approximation on train running time and headway time, and hence the results suggest that the number of seriously impacted trains and total delay time can be reduced significantly subject to little cost and risk.

Comparative study on the use of acoustic emission and vibration analyses for the bearing fault diagnosis of high-speed trains

2021 ◽  
pp. 147592172110360
Author(s):  
Dongming Hou ◽  
Hongyuan Qi ◽  
Honglin Luo ◽  
Cuiping Wang ◽  
Jiangtian Yang
Keyword(s):  
Acoustic Emission ◽  
Fault Diagnosis ◽  
High Speed ◽  
High Speed Train ◽  
Signal Attenuation ◽  
Transmission Path ◽  
Bearing Fault Diagnosis ◽  
Operation Conditions ◽  
Fault Features ◽  
High Speed Trains

A wheel set bearing is an important supporting component of a high-speed train. Its quality and performance directly determine the overall safety of the train. Therefore, monitoring a wheel set bearing’s conditions for an early fault diagnosis is vital to ensure the safe operation of high-speed trains. However, the collected signals are often contaminated by environmental noise, transmission path, and signal attenuation because of the complexity of high-speed train systems and poor operation conditions, making it difficult to extract the early fault features of the wheel set bearing accurately. Vibration monitoring is most widely used for bearing fault diagnosis, with the acoustic emission (AE) technology emerging as a powerful tool. This article reports a comparison between vibration and AE technology in terms of their applicability for diagnosing naturally degraded wheel set bearings. In addition, a novel fault diagnosis method based on the optimized maximum second-order cyclostationarity blind deconvolution (CYCBD) and chirp Z-transform (CZT) is proposed to diagnose early composite fault defects in a wheel set bearing. The optimization CYCBD is adopted to enhance the fault-induced impact response and eliminate the interference of environmental noise, transmission path, and signal attenuation. CZT is used to improve the frequency resolution and match the fault features accurately under a limited data length condition. Moreover, the efficiency of the proposed method is verified by the simulated bearing signal and the real datasets. The results show that the proposed method is effective in the detection of wheel set bearing faults compared with the minimum entropy deconvolution (MED) and maximum correlated kurtosis deconvolution (MCKD) methods. This research is also the first to compare the effectiveness of applying AE and vibration technologies to diagnose a naturally degraded high-speed train bearing, particularly close to actual line operation conditions.

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