@article{ author = {Mosleh, Araliya and Costa, Pedro Alves and Caçada, Rui}, title = {Development of a Low-Cost Trackside System for Weighing in Motion and Wheel Defects Detection}, abstract ={In modern societies, where sustainability, health and comfort are top of priorities, it is critical to devise new strategies to overcome this problem effectively. In line with the expansion of technology, the number of transportation increases, traffic is intense worldwide, and rail traffic is growing all over the world. Therefore, special attention is paid to railway vehicles, infrastructure maintenance and traffic safety. In the case of the interaction between a rolling wheel and a rail, forces arise from physical conditions, metal stress, deformation, noise, etc. In this context, the development of a low-cost trackside monitoring system to reduce maintenance costs and to improve ride quality is necessary. In addition, significant damages that may cause service interruptions or derailments can be prevented by early detection of wheels. In this paper, an application of a wayside monitoring system installed in the Portuguese Northern Railway Line to detect weigh-in-motion (WIM) is presented. The presented WIM system is part of a larger project PEDDIR: the Portuguese acronym for "Weighing in motion and wheel defect detection system." From the load measurement imposed by the axle onto the track, integrated into a proper algorithm, train specification can be calculated.}, Keywords = {Weigh-in-motion systems, Train, Track monitoring}, volume = {7}, Number = {1}, pages = {1-9}, publisher = {Iran University of Science & Technology}, doi = {10.22068/IJRARE.7.1.1}, url = {http://ijrare.iust.ac.ir/article-1-268-en.html}, eprint = {http://ijrare.iust.ac.ir/article-1-268-en.pdf}, journal = {International Journal of Railway Research}, issn = {2423-3838}, eissn = {2423-382X}, year = {2020} } @article{ author = {Naseri, Reza and Mohammadzadeh, Saee}, title = {Nonlinear Train-Track-Bridge Interaction with Unsupported Sleeper Group}, abstract ={One of the main characteristics of the ballasted track compared to the slab track is the ability to reduce the level of vibration on the bridge surface. However, due to factors such as the asymmetric or permanent settlement of the ballast layer (compaction), crushing, or moving of ballast particles, a gap between sleeper and ballast appears. This problem intensifies vibrations in the track and, as a result, can affect the dynamic response of the bridge. So far, the lack of scientific attention to this issue on the railway bridge is noticeable. Hence, in this article, by examining a nonlinear dynamic model of Train-Track-Bridge interaction, the effect of the unsupported sleeper on the dynamic behavior of a concrete railway bridge is studied. For this purpose, the influence of a suspended sleeper-group at the different positions along the bridge span, in a range of train speed and gap size, are investigated. It is demonstrated that for the case of the unsupported sleeper-group within the 2/8 and 5/8 of the bridge span, the acceleration of the bridge reaches its maximum. Also, the maximum load on the deck of the bridge increases by 45 to 60%.}, Keywords = {Train-tack-bridge system,Railway bridge dynamic,Unsupported sleeper,Wheel/rail interaction,Finite element method}, volume = {7}, Number = {1}, pages = {11-28}, publisher = {Iran University of Science & Technology}, doi = {10.22068/IJRARE.7.1.11}, url = {http://ijrare.iust.ac.ir/article-1-262-en.html}, eprint = {http://ijrare.iust.ac.ir/article-1-262-en.pdf}, journal = {International Journal of Railway Research}, issn = {2423-3838}, eissn = {2423-382X}, year = {2020} } @article{ author = {Haidari, Azade and HosseiniTehrani, Paris}, title = {Crack Driving Force Calculation for a Railway Wheel Considering Thermoplastic Properties of the Wheel Material}, abstract ={In this paper, the driving force calculation of a cracked railway wheel is studied, and the effects of thermal loads due to braking, train speed, and elastic-plastic material model are considered. Since the wheels are subject to fatigue loading and the property of its material is elastic-plastic, the study of crack growth in them is necessary because, in the case of existing a crack in the wheel and reaching its critical lengths, the failure of the wheel will occur. This is one of the important reasons for the accidents and derailment of trains. In this paper, the investigation of crack growth in the wheel is performed by two primary methods, linear elastic fracture mechanics (LEFM) and elastic-plastic fracture mechanics (EPFM) each of them has their specific condition of use. The applicability of each method in different conditions is discussed. The results demonstrate the importance of thermal loads of braking, train speed, and cyclic hardening material behavior on the usage of different approaches to achieve the appropriate crack driving force.  }, Keywords = {Thermal load, J integral, EPFM, Crack, Railway wheel}, volume = {7}, Number = {1}, pages = {29-39}, publisher = {Iran University of Science & Technology}, doi = {10.22068/IJRARE.7.1.29}, url = {http://ijrare.iust.ac.ir/article-1-263-en.html}, eprint = {http://ijrare.iust.ac.ir/article-1-263-en.pdf}, journal = {International Journal of Railway Research}, issn = {2423-3838}, eissn = {2423-382X}, year = {2020} } @article{ author = {Tavoosi, Jafar}, title = {Intelligent Variable Structure Control for Speed and Levitation of a Train}, abstract ={In this paper, for the first time a general type-2 fuzzy system (Linguistic or Mamdani) is used to estimate the sliding surface of the sliding mode control (SMC) method for train speed and levitation control. One of the important issues in controlling the train is its speed control, taking into account the cost function and control signals. Because the train system in this article is nonlinear and contains uncertain terms, a nonlinear method should be used, so type-2 fuzzy systems perform well in this regard. Also, the controller is designed to withstand external disturbances and non-modeling dynamics. In addition to system stability, the vibration signal control also improves. A comparison between general type-2 fuzzy SMC and type-1 fuzzy SMC has been done in the simulation. The simulation results prove the efficiency and superiority of the proposed method.}, Keywords = {Type-2 fuzzy system, Sliding mode control, High-Speed train, Levitation control.}, volume = {7}, Number = {1}, pages = {41-50}, publisher = {Iran University of Science & Technology}, doi = {10.22068/IJRARE.7.1.41}, url = {http://ijrare.iust.ac.ir/article-1-254-en.html}, eprint = {http://ijrare.iust.ac.ir/article-1-254-en.pdf}, journal = {International Journal of Railway Research}, issn = {2423-3838}, eissn = {2423-382X}, year = {2020} } @article{ author = {Mahmoudi, Seyed Mohsen and Bagheri, Morteza and Khademi, Navid and ShariatMohaymany, Afshi}, title = {A Method to Design Facility Layout in Passenger Terminals using Optimization and Simulation}, abstract ={In railway stations, an appropriate facility planning and layout design leads to enhance efficiency and passenger satisfaction. The present study provided a methodology to design facility layout by integrating simulation and optimization for passengers in public location, as well as proposing an innovative model to allocate candidate location to the facility. The proposed model results in the selection of the location for the facility with any dimension and without space limitation. Furthermore, it is usable for passenger’s terminal and all public locations. The advantages of the proposed model are reducing some parameters such as the movement duration of passengers, experienced passenger density, and flow rate, and increasing the quality of passenger terminals.}, Keywords = {Railway station, Facility layout, Simulation and optimization, Passenger satisfaction}, volume = {7}, Number = {1}, pages = {51-59}, publisher = {Iran University of Science & Technology}, doi = {10.22068/IJRARE.7.1.51}, url = {http://ijrare.iust.ac.ir/article-1-247-en.html}, eprint = {http://ijrare.iust.ac.ir/article-1-247-en.pdf}, journal = {International Journal of Railway Research}, issn = {2423-3838}, eissn = {2423-382X}, year = {2020} } @article{ author = {Babaeyzadeh, Mohammad and Fazel, Seyed Saee}, title = {Analysis of Semi-Bogie Based Propulsion System used in Tehran Metro Trains in Degraded Mode of Operation}, abstract ={During the supply process of rolling stocks for metro systems, the propulsion system of trains in terms of separate power and control scheme, should be selected based on the Reliability, availability, maintainability and safety (RAMS) parameters along with some expected indexes in operation plan. This means that, in addition to undeniable control and operation advantages of a train that are equipped with the bogie based propulsion system, the performance of the train is very important when an inverter module or each propulsion systemchr('39')s component fails, and therefore it should be considered to choose the propulsion system type. Now, a technical grading of propulsion system types can be made from the point of origin which is car based type with the minimum advantages of operation, to the point of destination which is bogie based type with the maximum advantages of operation. Therefore, the semi-bogie based type that has been applied in Tehran metro trains with one common DC link, input protection circuit and control, is located in the middle of this grading. However, the definitions of the above mentioned propulsion system types are presented at the beginning of this paper, in order to clarify the functional behavior of semi-bogie based type in degraded and faulty mode of operation to determine its exact position in above mentioned grading between the first two types, some investigation will be done based on the simulation in MATLAB and the results will be presented.}, Keywords = {Propulsion system, Car based, Bogie based, Semi-bogie based, Degraded mode, RAMS}, volume = {7}, Number = {1}, pages = {61-72}, publisher = {Iran University of Science & Technology}, doi = {10.22068/IJRARE.7.1.61}, url = {http://ijrare.iust.ac.ir/article-1-266-en.html}, eprint = {http://ijrare.iust.ac.ir/article-1-266-en.pdf}, journal = {International Journal of Railway Research}, issn = {2423-3838}, eissn = {2423-382X}, year = {2020} } @article{ author = {Zakeri, Jabbar Ali and Rahmani, Fatemeh and talebi, rosh}, title = {Development of Track Geometrical Evaluation index using Power Spectral Density Method}, abstract ={In order to reach a desired quality in railway tracks and to maintain this quality in an acceptable level, a systematic and regular maintenance plan must be performed. By proper management of track maintenance and codification of proper methods to evaluate the quality of railway tracks, a desired quality can be reached. For this purpose, some indices should be defined and maintenance limits of railway tracks should be determined based on these indices. Various geometrical indices have been defined in the railways and these indices are utilized by maintenance management systems. Each of these indices, because of their limitations or some special conditions, is not dependable in some tracks and their results are not acceptable. So, the main aim of this research is to develop a dependable geometrical index and the PSD[1] method is used to achieve this goal. This paper has been tried to utilize a recently developed index compared with other indices and the relationship between this index and other indices is expressed. That is, by developing the PSD index, the relationship between PSD and TGI, PSD and CTR geometrical indices has been expressed. It was found that either of mentioned indices (TGI and CTR) has a linear relationship with PSD index. By comparing the indices it is concluded that PSD index provides more details about the geometrical status of the track. Thus, using PSD index, track maintenance decision makers will be able to schedule the maintenance programs effectively.    }, Keywords = {TGI, PSD, CTR, geometrical indices, maintenance, track recording car}, volume = {7}, Number = {1}, pages = {73-84}, publisher = {Iran University of Science & Technology}, doi = {10.22068/IJRARE.7.1.73}, url = {http://ijrare.iust.ac.ir/article-1-261-en.html}, eprint = {http://ijrare.iust.ac.ir/article-1-261-en.pdf}, journal = {International Journal of Railway Research}, issn = {2423-3838}, eissn = {2423-382X}, year = {2020} }