Papers by Keyword: Railway

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Authors: Zhi Bin Zhang, Qing Liu, Hai Rui Wang, Yong Shen
Abstract: Curve adjusting is an important part in the railway maintenance and plays a major role in the railway safe operations. To meet the requirements of calculating versine in the lining and lifting work carried out by the tamping wagon, this paper proposes an approach for modelling the track curve and an algorithm for calculating the versine of any point in the rectangular coordinate system. The model and the algorithm are both verified and proved.
Authors: Dan Zhu Wang, Mao Xiang Lang
Abstract: Logistics network design problem has an important position in the railway logistics development, it has aroused great concern both in railway transportation and logistics research fields. This paper proposes a method for railway logistics network design problem based on artificial neural network model. In the logistics network design method, various influencing factors of railway logistics network have been considered. An evaluation index system of a railway transportation enterprise is set up. Self-Organizing Map neural network algorithm has been used for the creation of logistics network nodes initial set. And the layers division of the logistics network has been determined with the help of BP neural network model. Subsequently an empirical study of a railway logistics enterprise is given to certificate the feasibility and accuracy of this railway logistics network design method.
Authors: Zdenka Popović, Luka Lazerević, Nikolay Vatin
Abstract: In this paper it was performed curve negotiation analysis of three axle bogie of locomotive type JŽ 461. This locomotive has large distance between first and middle i.e. middle and last axle, which leads to increased lateral forces during curve negotiation. Final result might be widening of track gauge in curves with small radius. This paper points that Infrastructure Manager must take into account vehicle performances and type of track when defines track gauge in curves.
Authors: Ioan Sebesan, Yahia Zakaria
Abstract: The bogie frame, which is used on LDE 060-DA locomotives, will be the subject of this paper. The method of analyzing its static behavior includes two static structural simulations. The first simulation is performed with SolidWorks while the second one is performed with Ansys. The simulations steps and the related assumptions will be explained in details. Finally the two sets of results gained from both simulations are compared to draw out final conclusions.
Authors: Zhan Gao, Kai Xu
Abstract: The paper will introduce the composition and its working principle of the electronic horizontal beam and the remote automatic monitoring system. Subsequently, the author will illustrate specific project to elaborate the monitoring function of the system when people try to control railway track deformation. When tunnel shield crosses under railway, the system can carry on real-time processing, data analysis and then feedback these information to the construction party so as to guide the construction to ensure the security and stability of the railway. This system is applied in the Shanghai subway 9th line crossing project which crosses Shanghai-Hangzhou special railway. With the system, the normal operation of the railway is safeguarded in the process of crossing.
Authors: Triono Agus, Wiratmaja Puja Ign, Hilman Syaeful Alam, S. Rochim
Abstract: One of the natural fiber considered to replace syntetic fiber is Oil Palm Empty Fruit Bunches (OPEFB) fiber which offer advantages such as environment friendly and widely available especially in indonesia . This study investigates the characteristics of railway brake block with OPEFB fibres compare to synthetic fiber. All the test results were compared to the technical requirement of PT. Kereta Api Indonesia (PT. KAI ) and evaluated using Extension Evaluation Method (EEM) to select and get the best sample. From the evaluation results using EEM, one of non commercial sample using OPEFB fiber give a better results compare to commercial sample using synthetic fibers. So it can be concluded that OPEFB fiber as reinforcement for railway brake material could improve physical and mechanical properties of the material, environment friendly and could replace synthetic fibers.
Authors: Momir Praščevič, Aleksandar Gajicki, Darko Mihajlov, Nenad Živković, Ljiljana Zivkovic
Abstract: Application of the prediction models for railway noise indicators calculation, which was already developed by other countries, represents a major challenge in Serbia. Prediction model "Schall 03" was developed in line with technical and technological characteristics of the rolling stock and infrastructure of German Railways. Prior to its application at the national level, due to different technical-technological characteristics of railway stock and railway infrastructure it is necessary to perform its validation and, depending on the needs, the calibration in accordance with local conditions. This will assure accuracy and precision of the calculations of noise indicators, as well as confidence in the results obtained by prediction model "Schall 03". This paper presents the analysis of the possibilities to apply German prediction model "Schall 03" on the Serbian railway network, more precisely railway section from Belgrade to Romanian border. Calculated values of noise indicators were compared with the results of measurements of noise indicators within measuring interval, which correspond to the referent time intervals for different day periods.
Authors: Xu Peng, Ying Ying Zhou, Qian Yong Li, Xiao Qiong He
Abstract: 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.
Authors: Yong Xiang Zhao, Bing Yang, Guo Xiang Song
Abstract: Chemical composition and physical properties are measured and inspected for China railway grade B cast steel wheel. The wheel shows slight higher for chemical elements C and Cr, much higher for Al and Mo, and significant lower for P and S comparing to the AAR code. Gross pearlites plus net-like continuum ferrites appear in wheel hub; ferrites exhibit also net-likely but dis-continuously in web with a shot peening effect; and in rim, dis-continuous ferrites with few of net-like signs distribute randomly due to a quenching and tempering effect. Bigger hardness values appear in rim; and the values in web and hub appear a decrease in sequence. Major flaw affecting material condense is shrinkage porosities. Flawed content is closely between hub and web. More condense appears in rim. Material inclusions are non-metallic compounds of MnS and Al2O3. They appear sphere-like shapes having around 8 μm diameters.
Authors: Charalampos Sokos
Abstract: The characterization of microstructures, mechanical properties, deformation, damage initiation, and growth by Non-Destructive Evaluation techniques is assuming a vital role in various materials. In this paper, the use of Magnetic Barkhausen Noise technique for characterization of mechanical properties in magnetic steel would be discussed. The results have shown that hardening depth and its quality with respect to the microstructure in induction hardened specimens could also be established using the Magnetic Barkhausen Noise technique.
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