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.

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.

On prospects for the development of high-speed railway lines in Russia

2017 ◽  
pp. 7-14
Author(s):  
Nikolay Bushuyev ◽  
Darina Shulman
Keyword(s):  
Russian Federation ◽  
High Speed ◽  
Network Formation ◽  
Practical Importance ◽  
High Speed Railway ◽  
Complex Approach ◽  
Study Results ◽  
High Speed Trains ◽  
The Russian Federation ◽  
Traffic Organization

Objective: To consider the prospects for the development of high-speed railway lines (VSM) in Russia. To analyze the fundamentals of “Updated program of high-speed railway communication on the territory of the Russian Federation” approved on November, 23rd 2015 by the decision of OAO “RZhD” board meeting and the social board on the issues of high-speed railway communication in Russia. To formulate the specificities of high-speed traffic organization: promising directions of high-speed headings realization before 2030, as well as the stages of their implementation in Russia. Methods: Multiple regression analysis, as well as the method of multi criterial decisions optimization was applied in the study. Results: The analysis of current and perspective headings was carried out, as well as such characteristics as speed and the running time of “Sapsan” high-speed trains and “Allegro”, “Strizh”, “Lastochka” rapid trains. Special attention was paid to the comparison of strategies given in “Updated program of high-speed railway communication on the territory of the Russian Federation” with the main scientific findings stated in VSM network formation part, obtained on the basis of complex approach to the solution of justification of VSM network formation stage-by-stage approach, taking into account multi criterial estimation of cities and regions’ potential and application of mathematical traffic flow model approach as part of basic regional socioeconomic indices of cities and regions, situated in the zones attractive for future VSM construction. Practical importance: The conclusion was made on the necessity to continue exploratory development in the sphere of topology specification research and stage-by-stage formation of the first VSM in Russia.

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>

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.

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.

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.

scholarly journals A Study on the Energy-Harvesting Device with a Magnetic Spring for Improved Durability in High-Speed Trains

Micromachines ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 830
Author(s):  
Jaehoon Kim
Keyword(s):  
Energy Harvesting ◽  
High Speed ◽  
Permanent Magnets ◽  
Critical Issue ◽  
Sensor Nodes ◽  
High Speed Train ◽  
Vibration Energy Harvesting ◽  
Magnetic Spring ◽  
High Speed Trains ◽  
Energy Harvesting Devices

Durability is a critical issue concerning energy-harvesting devices. Despite the energy-harvesting device’s excellent performance, moving components, such as the metal spring, can be damaged during operation. To solve the durability problem of the metal spring in a vibration-energy-harvesting (VEH) device, this study applied a non-contact magnetic spring to a VEH device using the repulsive force of permanent magnets. A laboratory experiment was conducted to determine the potential energy-harvesting power using the magnetic spring VEH device. In addition, the characteristics of the generated power were studied using the magnetic spring VEH device in a high-speed train traveling at 300 km/h. Through the high-speed train experiment, the power generated by both the metal spring VEH device and magnetic spring VEH device was measured, and the performance characteristics required for a power source for wireless sensor nodes in high-speed trains are discussed.

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.

The Aerodynamic Characteristics of the Pantograph When the Train Passes Through the Tunnel

2017 ◽  
Author(s):  
Dilong Guo ◽  
Wen Liu ◽  
Junhao Song ◽  
Ye Zhang ◽  
Guowei Yang
Keyword(s):  
High Speed ◽  
Aerodynamic Force ◽  
Maximum Amplitude ◽  
Aerodynamic Characteristics ◽  
High Speed Train ◽  
Expansion Waves ◽  
Compression And Expansion ◽  
High Speed Trains ◽  
Current Characteristics ◽  
Pass Through

The aerodynamic force acting on the pantograph by the airflow is obviously unsteady and has a certain vibration frequency and amplitude, while the high-speed train passes through the tunnel. In addition to the unsteady behavior in the open-air operation, the compressive and expansion waves in the tunnel will be generated due to the influence of the blocking ratio. The propagation of the compression and expansion waves in the tunnel will affect the pantograph pressure distribution and cause the pantograph stress state to change significantly, which affects the current characteristics of the pantograph. In this paper, the aerodynamic force of the pantograph is studied with the method of the IDDES combined with overset grid technique when high speed train passes through the tunnel. The results show that the aerodynamic force of the pantograph is subjected to violent oscillations when the pantograph passes through the tunnel, especially at the entrance of the tunnel, the exit of the tunnel and the expansion wave passing through the pantograph. The changes of the pantograph aerodynamic force can reach a maximum amplitude of 106%. When high-speed trains pass through tunnels at different speeds, the aerodynamic coefficients of the pantographs are roughly the same.

scholarly journals Characteristics of airflow in the platform with high-speed train passing through the underground railway station

2020 ◽  
Vol 165 ◽  
pp. 04075
Author(s):  
Qizhang Li ◽  
Yongliang Xie
Keyword(s):  
Energy Consumption ◽  
High Speed ◽  
High Speed Train ◽  
Air Velocity ◽  
Railway Station ◽  
High Speed Railway ◽  
Air Conditioning System ◽  
Environment Control ◽  
Underground Railway ◽  
Waiting Line

Underground high-speed railway station is becoming more and more popular in recent years, due to its advantage in relieving the tense situation of urban construction land. HVAC (Heating, Ventilation and Air Conditioning) system of underground railway station consumes large energy, therefore it is necessary to find a way to decrease the energy consumption in stations. Reasonable ventilation and air organization are the basis of energy-saving design of environment control system in stations. The energy consumption could be reduced greatly by utilizing the piston wind properly. In the present work, airflow characteristics in the station are investigated when high-speed train is passing through the underground railway station with CCM+ software. Results show that piston wind has different effects on airflow in the platform when the high-speed train is running. However, the air velocity in the platform is always lower than 5 m/s. In order to analyse the effect of piston wind on the airflow in the platform in more detail, the velocities and temperatures at waiting line are extracted. The air velocity near two ends of platform is larger and the similar results could also be observed for temperatures.

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