• Title/Summary/Keyword: Train model

Search Result 1,713, Processing Time 0.026 seconds

An Exploratory Development of Mathematical Programming Model for the Railway Conflict Resolution Problem on a Single Line Track (단선구간 열차경합해소 문제를 위한 수리계획 모형의 기본설계)

  • Oh Seog-Moon;Hong Soon-Heum;Kim Jae-Hee
    • Journal of the Korean Society for Railway
    • /
    • v.8 no.4
    • /
    • pp.314-320
    • /
    • 2005
  • This paper is designed to help train dispatcher resolve railway conflicts in rent-time. We developed a mixed integer programming model to optimize the train schedule that determines the best overtaking or crossing positions, The objective of the model is to minimize the maximum lateness of the trains and reduce the total sum of the lateness, while satisfying the field constraints associated with the difference between passenger trains and freight trains, and the limited number of sidings. We applied the model on a portion of a single line track, Joong-Ang Line to ascertain the efficiency of the model, and showed how the model can be used to resolve the railway conflicts. The results indicates that our model can provide useful results in terms of optimal schedule for the test problem. This type of modeling approach would be useful for a train dispatcher to make a real-time railway conflict resolution.

Dynamic analysis of train-bridge system under one-way and two-way high-speed train passing

  • Jahangiri, Meysam;Zakeri, Jabar-Ali
    • Structural Engineering and Mechanics
    • /
    • v.64 no.1
    • /
    • pp.33-44
    • /
    • 2017
  • In this paper, the dynamic responses of train-bridge system under one-way and two-way high-speed train passing are studied. The 3D finite element modeling is used and the bridge and train are modeled considering their details. The created model is validated by the results of the dynamic field test. To study the effect of train speed, different train passing scenarios are analyzed, including one-way passing, two-way passing in different directions at same speeds, and two-way passing in different directions at different speeds. The results show that the locations of maximum acceleration are different in one-way and two-way passing modes, and the maximum values in two-way passing mode are higher than those in one-way passing mode, while the maximum accelerations in both modes are almost identical. The displacement and acceleration values in different scenarios show peaks at speeds of 260 and 120 km/h, due to the proximity of the natural frequencies of the bridge and loading frequencies of the train at these speeds.

Development of Dual Mass Flywheel (이중질량플라이휠의 개발)

  • 지태한;정재훈;송영래
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • 2003.11a
    • /
    • pp.1067-1072
    • /
    • 2003
  • Generally dual mass flywheel(DMF) is used as a solution to reduce noise and vibration of power train system and to improve the comfortability of passenger car. In this paper, design concept of new DMF model, analytical/numerical model, test procedure and tuning results are presented. Design parameters are studied by some numerical methods and tests. As the result, we can find more efficient model of DMF and reduce vibration level in power train system.

  • PDF

An Operation Simulation of MAGLEV using DEVS Formalism Considering Traffic Wave (승객 유동을 고려한 DEVS 기반 자기부상열차 운행 시뮬레이션)

  • Cha, Moo-Hyun;Lee, Jai-Kyung;Beak, Jin-Gi
    • Journal of the Korea Society for Simulation
    • /
    • v.20 no.3
    • /
    • pp.89-100
    • /
    • 2011
  • The MAGLEV (Magnetically Levitated Vehicle) system, which is under commercialization as a new transportation system in Korea, is operated by means of unmanned automatic control system. Therefore the plan of train operation should be carefully established and validated in advance. In general, when making the train operation plan, the statistically predicted traffic data is used. However, traffic wave can occur when real train service is operated, and the demand-driven simulation technology is required to review train operation plans and service qualities considering traffic wave. This paper presents a method and model to simulate the MAGLEV's operation considering continuous demand changes. For this purpose, we employed the discrete event model which is suitable for modeling the behavior of railway passenger transportation, and modeled the system hierarchically using DEVS (Discrete Event System Specification) formalism. In addition, through the implementation and experiment using DEVSim++ simulation environment, we tested the feasibility of the proposed model and it is also verified that our demand-driven simulation technology could be used for the prior review of the train operation plans and strategies.

A Study on the Design of a 130kW-class IPMSM for Propulsion of Tram-Train (트램-트레인 추진용 130kW급 IPMSM 설계 연구)

  • Jeong, Geochul;Park, Chan-Bae;Lee, Hyung-Woo;Lee, Sang-Don;Lee, Ju
    • Journal of the Korean Society for Railway
    • /
    • v.19 no.4
    • /
    • pp.427-435
    • /
    • 2016
  • This study considers the design of a 130kW-class IPMSM for propulsion of a Tram-Train. This Tram-Train has a wide range of speed variation. For this reason, this study suggested IPMSM, which has wide speed variation as a motor for propulsion of the Tram-Train, a basic model suitable for the required traction force was designed. IPMSM has different electromagnetic and structural characteristics depending on the shapes of its rotor. Therefore, the suggested model was additionally designed, and by dividing a permanent magnet was changed so as th have a shape with an added bridge. Finally, by analyzing the load characteristics with finite element analysis of the basic and suggested models and by comparing electromagnetic and structural characteristics, a model has been derived that satisfies IPMSM for the propulsion of the Tram-Train.

A Study on the Train Operation Optimization for Energy Saving (친환경 에너지 절약을 위한 열차운전 최적화 연구)

  • Choi, Ik-Sik;Jang, Woo-Jin;Choi, Kyu-Hyoung
    • Proceedings of the KSR Conference
    • /
    • 2011.10a
    • /
    • pp.1059-1065
    • /
    • 2011
  • In line with the expansion of electric railway, reducing carbon emission and optimal train operation are required by economical, eco-friendly and efficient management. Most of the energy consumption in electric railway is consumed by train operation. So it is important that minimize the energy consumption in train operation. An analysis of the operation performance of the new model vehicle which in South Korea, Korail introduced shows that the energy consumption is different in line with the skill level of the engine driver. In this study, the know-how of train operation of a skilled engine driver is systematized by using artificial intelligence, and the technique which supports engine drivers with train operation was offered. As a result of applying in South Korea, the Gyeongbu line by using simulation, it confirmed that the maximum 20% can reduce the energy consumption in comparison with unskilled engine drivers in case of applying the Expert System.

  • PDF

A Study on Propagation Characteristic of Noise Sources for Korea Train Express (한국형 고속철도의 소음 전파특성에 관한 연구)

  • 유충준;김재철
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.14 no.3
    • /
    • pp.224-229
    • /
    • 2004
  • In order to control the railway noise, the radiation characteristic of the noise when the train passes by should be analyzed. Generally, the major noise sources of the Korea Train Express are the rolling noise and power unit noise up to 300km/h. In this paper, a train model that is considered to be a row of point sourcesis introduced to analyze the radiation characteristic. The analysis results are compared with the measurement ones. It is shown that the propagation characteristic of the rolling noise is a dipole type and the noise generated by the power unit is radiated as a cosine type. With increasing of the train speed, the noise level at a receiving point is increased in the direction of motion and reduced in the direction opposite to the motion. The analysis results including the moving effect of the noise source at 300km/h show good agreement with the measurement results.

Dynamic response of steel-concrete composite bridges loaded by high-speed train

  • Podworna, Monika
    • Structural Engineering and Mechanics
    • /
    • v.62 no.2
    • /
    • pp.179-196
    • /
    • 2017
  • The paper focuses on dynamic analyses of a series of simply-supported symmetric composite steel-concrete bridges loaded by an ICE-3 train moving at high speeds up to 300 km/h. The series includes five bridges with span lengths ranging from 15 m to 27 m, with repeatable geometry of the superstructures. The objects, designed according to Polish standards valid from 1980s to 2010, are modelled on the bridges serviced on the Central Main Line in Poland since 1980s. The advanced, two-dimensional, physically nonlinear model of the bridge-track structure-high-speed train system takes into account unilateral nonlinear wheel-rail contact according to Hertz's theory and random vertical track irregularities equal for both rails. The analyses are focused on the influence of random track irregularities on dynamic response of composite steel-concrete bridges loaded by an ICE-3 train. It has been pointed out that certain restrictions on the train speed and on vertical track irregularities should be imposed.

Analysis of the Formal Specification Application for Train Control Systems

  • Jo, Hyun-Jeong;Yoon, Yong-Ki;Hwang, Jong-Gyu
    • Journal of Electrical Engineering and Technology
    • /
    • v.4 no.1
    • /
    • pp.87-92
    • /
    • 2009
  • Many critical control systems are developed using formal methods. When software applied to such systems is developed, the employment of formal methods in the software requirements specification and verification will provide increased assurance for such applications. Earlier errors of overlooked requirement specification can be detected using the formal specification method. Also, the testing and full verification to examine all reachable states using model checking to undertake formal verification are able to be completed. In this paper, we proposed an eclectic approach to incorporate Z(Zed) formal language and 'Statemate MAGNUM', formal method tools using Statechart. Also we applied the proposed method to train control systems for the formal requirement specification and analyzed the specification results.

A Study on a Tram Signal Priority Strategy for Commercialization of the On-Board Oriented Train Control System (차상중심 열차제어시스템 실용화를 위한 트램 우선신호 전략 연구)

  • Baek, Jong-Hyen;Sung, Yu-Suk;Kim, Gonyop;Choi, Hyeon Yeong
    • The Transactions of The Korean Institute of Electrical Engineers
    • /
    • v.64 no.10
    • /
    • pp.1493-1500
    • /
    • 2015
  • For efficient and economical train operation in low-density railway line, on-board oriented train control system, which reduces expensive wayside equipment, is being developed. In this paper, we discuss a tram signal priority strategy which enables efficient and safe train operation when the developing system is applied to train-tram railway environment. Based on the well-known transit signal priority strategies, we develop a tram signal priority algorithm and conduct simulations by using model-based systems engineering (MBSE) tool. Various considerations such as operation procedure, linkage to existing road traffic system, applicability with respect to crossroad types, and so on, are also dealt with.