• Title, Summary, Keyword: Railway vehicle

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Field Measurement of the Center of Gravity and the Moment of Inertia of Railway Vehicles Using Vibration (진동을 이용한 철도차량의 무게중심과 관성모멘트 현장 측정)

  • Song, Ki-Seok;Choi, Yeon-Sun
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.23 no.10
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    • pp.878-884
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    • 2013
  • The center of gravity and the moment of inertia of railway vehicles are important parameters for running safety and stability in railway vehicle design. However, the exact measurement of those is difficult in manufacturing field. The weight measurement of a railway vehicle beneath the wheel using a weight scale is off by a large amount. This paper suggests a measurement method for the center of gravity and the moment of inertia of railway vehicles using vibration. For the measurement a railway vehicle is suspended using four wires. Direct measurement of the tension of the wires and the period of swinging motion of the suspended railway vehicle with calculations give the exact location of the center of gravity and the moment of inertia in x, y, and z directions, respectively. This implementation was demonstrated using an experimental device and verified numerically.

A Study on Characteristic of Power Conversion System in Electric Railway Vehicle According to Contact Loss in Feeding System Considering Characteristic of Rigid Bar (강체전차선로의 특성을 고려한 급전시스템에서 이선에 따른 철도차량 전력변환장치에 대한 특성에 관한 연구)

  • Jung, No-Geon;Lee, Hwan;Kim, Jae-Moon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.3
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    • pp.520-525
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    • 2016
  • In this paper, Characteristic of power conversion unit of a railway vehicles according to contact loss in feeding system that applied impedance of rigid conductor is analyzed. It applied impedance of rigid bar in modeling of electric railway system. Railway vehicles are performed of modeling based on the performance of the electric railway vehicle. Effects of the contact loss in the power conversion unit were analyzed via main transformer of railway vehicle, the input and output voltage characteristics of the converter through contact loss was generated after linking the vehicle with feeding system.

Computerized Railway Alignment Evaluation and Construction Quantity Estimation (궤도선형 계산 및 수량 산출 프로그램 개발)

  • Jee Sang Bok;Lee Tai Sik;Lee Dong Wook
    • Journal of the Korean Society for Railway
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    • v.8 no.4
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    • pp.379-384
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    • 2005
  • To maintain the stability during the operation of railway vehicle, the perfect installation of rail, namely the orbit as well as the performance of the railway vehicle itself is required. The orbit of railway needs the intensity and elasticity that stands the shock and vibration due to the weight of the railway vehicle enough, Also, the driving safety during the operation of vehicle should be guaranteed, comfortable feeling of the passenger should be maintained, and the influence of the noise and vibration to the environs should be minimized. Therefore, it is necessary to develop a program that calculates the change of construction cost according to the selection of railway orbit. This study introduces the orbit design automation program according to the selection of railway orbit, and discuss the principle and the way to use of the program.

Design and Control of Railway Vehicle Suspension System Featured by MR Damper (MR 댐퍼를 적용한 철도차량 현가장치의 설계 및 제어)

  • Ha, Sung-Hoon;Choi, Seung-Bok;Lee, Kyu-Seob
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.71-76
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    • 2010
  • This paper presents the feasibility for improving the ride quality of railway vehicle equipped with semi-active suspension system using magnetorheological(MR) fluid damper. In order to achieve this goal, a fifteen degree of freedom of railway vehicle model, which includes a car body, bogie frame and wheel-set is proposed to represent lateral, yaw and roll motions. The MR damper system is incorporated with the governing equation of motion of the railway vehicle which includes secondary suspension. To illustrate the effectiveness of the controlled MR dampers on railway vehicle secondary suspension system, the sky-hook control law using the velocity feedback is adopted. Computer simulation for performance evaluation is performed using Matlab. Various control performances are demonstrated under external excitation which is the creep force between wheel and rail.

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A Study on Development of Maintenance Skill Training Simulator for Railway Vehicle

  • Jung, NoGeon;Kim, BoSung;Lee, JaeBong;Lee, SangMoon;Koo, KyungWan;Kim, JaeMoon
    • International Journal of Internet, Broadcasting and Communication
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    • v.7 no.2
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    • pp.113-116
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    • 2015
  • Generally, in the railway vehicle the driving force of gravity happens by the high-speed running and the repetitive impulse cause the degradation and the malfunction phenomenon shows differently because the durability of each component changes according to the internal and external causes. The maintenance of propulsion control device which is played the very important role as to the stable service of the railway vehicle is greatly important among them. Therefore maintenance training propulsion control device simulator is needed to maximize learning through repetition and improve the maintenance practical skills training. This paper designed the railway vehicle running device with a miniature for the railway vehicle maintenance training and developed a propulsion control device simulator equipped the imitation steering wheel.

STUDY ABOUT BRAKE SHOE APPLIED RAILWAY VEHICLE IN KOREA (국내 철도차량용 제륜자 특성에 관한 연구)

  • Yang, Bang-Sub;Kim, Chul-Gun
    • Proceedings of the KSR Conference
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    • pp.78-81
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    • 2007
  • In this study, brake shoe applied railway vehicle in korea is investigated and estimated a point of view effecting on wheel wear and brake performance, vehicle performance. The property and shape of brake shoe on domestic and foreign vehicle is compared and estimated and brake shoe applied railway vehicle in korea is recommended.

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Experimental Study on the lateral dynamic characteristics of urban railway vehicle (도시철도차량의 횡방향 운동 특성에 대한 실험적 연구)

  • Kim Tae-Ho;Lim Won-Sik
    • Proceedings of the KSR Conference
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    • pp.308-313
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    • 2005
  • An urban railway vehicle has a characteristics such as that a lot of passenger use it and the major of passenger is standee. The ride comfort of standee is greatly influenced by the lateral dynamic characteristics of vehicle. So the lateral vibration is important factor for the improvement of ride comfort. In this study, vibration test of railway vehicle is carried out under the same condition of field driving to find out the major factor of vibration. By considering the test results under the various driving condition, the vibrational characteristics of vehicle is verified.

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Preliminary Design and Development Framework of Railway Vehicle Simulator for Engineering Evaluation Analysis

  • Kim, Hong-Chan;Kim, Jeung-Tae
    • International Journal of Railway
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    • v.4 no.1
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    • pp.5-11
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    • 2011
  • The purpose of the present study is to develop conceptual design of a railway vehicle simulator based on a scaled model. Although the scaled simulator is limited in its ability to manipulate the full dynamics of a full-size railway vehicle, it has been known to have an advantage in that it could provide means of testing the fundamental dynamic behavior within a limited laboratory space and at low operation cost. The present study proposes a design strategy for a simulator so that a small scaled roller rig could be fabricated and operated in laboratory setting based on the design philosophy. The data obtained from experimental testing using a scale model can be used to verify and interpret the dynamic performance of full-scale railway vehicle by applying appropriate non-dimensional analysis.

Development of the Roller Rig for 1/5 Scaled Half Railway Vehicle to perform Running Stability Test (철도차량 주행안정성 시험용 축소형 반차체 주행시험기 개발)

  • Shin, Yu-Jeong;You, Won-Hee;Hur, Hyun-Moo;Park, Joon-Hyuk
    • Journal of the Korean Society for Precision Engineering
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    • v.28 no.5
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    • pp.543-550
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    • 2011
  • The development of railway vehicles such as new mechanism of railway vehicle or design parameters of suspension have been used the application of scaled roller rig to the study of railway vehicle dynamics. In this paper, the critical speed was compared between full scale and 1:5 scale of numerical model. And to verify the simulation results, the critical speed was confirmed using the 1:5 scaled roller rig. According to the results, we expect that the developed roller rig will be used in the study for the dynamic characteristics of railway vehicle.

A Study on Implementation of RCM for Railway Vehicle (철도차량의 신뢰성기반 유지보수(RCM) 실시 방안)

  • Park, Byoung-Noh;Joo, Hae-Jin;Lee, Chang-Hwan;Lim, Sung-Soo
    • Proceedings of the KSR Conference
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    • pp.1487-1493
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    • 2008
  • Railway vehicle is very important to implement the effective maintenance in proper to prevent any failure during operation period. Many railway authorities are making efforts to maintain the railway vehicle through scientific and systematic procedure. To achieve this, Reliability Centered Maintenance(RCM) is partially applied. The efficiency of RCM has proven and its terminology was familiar with nuclear power, military and chemical plant etc. since the commercial aircraft's industries has introduced the maintenance program based on the target of reliability. The application of RCM on railway vehicle can be utilized with systematic analysis method to select the best effective maintenance period and action to prevent the failures by selecting the equipment affecting the its safety and reliability. This paper is presented that the procedure of adequate and effective maintenance for railway vehicle by comparing among the related standards in example IEC60300-3,11, MIL-STD-2173, and technical documents or papers. In accordance with above result, RCM procedure is proposed to apply effectively for maintenance of railway vehicle. That is, (1) Analysis of data and Calculation of criticality per equipment (2) Selection of equipment to analyze (3) Analysis of failure mode and effect (4) Evaluation of maintenance method and period (5) Optimization of maintenance program through renewal of maintenance method and period.

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