• 제목, 요약, 키워드: 철도차량 동역학

Search Result 89, Processing Time 0.046 seconds

Study on Mechanical Parameters of a Wheelset Influencing Derailment of Rolling Stock (철도차량탈선에 영향을 미치는 윤축의 기계적 인자에 관한 연구)

  • Oh, Hyun Sun;Koo, Jeong Seo
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.37 no.10
    • /
    • pp.1207-1218
    • /
    • 2013
  • It is difficult to predict derailment with the existing derailment coefficient like Nadal's formula which is based on the contact forces between one wheel and rail. A new derailment coefficient model developed on a wheelset is able to make a better estimate about the climb derailment, slip derailment, roll over derailment, and mixed derailment types of these. Moreover, not only the mechanical factors considered in the existing derailment coefficients but also other various factors affecting derailment such as wheel unloading and loading, diameter of wheel, and locations of axle-box bearings can be covered with this new derailment coefficient model. That is, the derailment patterns which couldn't be solved with the existing formulas such as Nadal's and Weinstock's models can be analyzed with this wheelset derailment coefficient model because of considering various factors causing derailment. Finally, the validity of the new derailment coefficient model is verified using dynamic model simulations.

A Study on the Running Safety by F26 Turnout and Vehicle Model (F26 분기기 및 열차모델을 이용한 주행안전성 연구)

  • Kim, Sung-Jong;Lee, Hi-Sung
    • Journal of the Korean Society for Railway
    • /
    • v.12 no.6
    • /
    • pp.859-864
    • /
    • 2009
  • When the vehicle passes through turnout, the design is required to minimize the change of lateral force. Therefore, in case the vehicle passed the through turnout, we ought to execute dynamic analysis of the interaction between the vehicle and turnout in order to make an estimate of the lateral force and the derailment coefficient on the turnout. In this paper, we established the analytical model of the vehicle and turnout and analysed running safety when the vehicle passes through turnout in order to improve running safety of the vehicle on turnout. Also, to verify the vehicle and turnout model, we analysed reaction force and running behavior between wheel and rail, and running safety of the vehicle by changing cradle part and the tongue rail when the vehicle passes through turnout.

2D Modeling and Brake System Simulation of a Train (철도차량 2D 모델링 및 제동시스템 시뮬레이션)

  • Kang, Chul-Goo;Kim, Ho-Yeon;Goo, Byeong-Choon
    • Proceedings of the KSME Conference
    • /
    • /
    • pp.811-816
    • /
    • 2008
  • Train dynamics affects significantly safe and efficient operation of a train, especially during traction or braking period. Train dynamics is intrinsically complex due to many DOF motions in a three-dimensional space, and its behavior during the braking stage is too complex to understand and design an effective braking logic of the train. In this paper, we present a two-dimensional model with three DOF motion in a longitudinal, vertical, and pitch direction for the Hanvit 200 tilting train, which is efficient to analyze a braking performance. Furthermore, we analyze the braking logic and simulate the braking process of the Hanvit 200 tilting train using Simulink.

  • PDF

Study on Experimental Equipment for Anti-Skid Control Logic Test (활주방지로직 시험장치에 대한 연구)

  • Kim, Ho-Yeon;Kang, Chul-Goo
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.35 no.1
    • /
    • pp.85-90
    • /
    • 2011
  • To maintain the safety and efficiency of railroad vehicles, it is important to understand the working of the brake system with anti-skid control unit (ASCU) for rolling stocks. In this paper, a HILS (Hardware In-the Loop Simulations) system with ASCU hardware (for logic) and a DSP board (for dynamics) is developed to analyze skidding of the Hanvit-200 train during the process of braking. Experimental results are presented for the case that the skid on one of the four wheels is artificially generated using a Simulink model. A convenient GUI is prepared using ControlDesk of dSPACE.

Analysis of Dynamic Characteristics for Concept Design of Independent-Wheel Type Ultra-High-Speed Train (독립차륜형 초고속 열차 개념 설계안의 동특성 해석)

  • Lee, Jin-Hee;Kim, Nam-Po;Sim, Kyung-Seok;Park, Tae-Won
    • Journal of the Korean Society for Railway
    • /
    • v.17 no.1
    • /
    • pp.28-34
    • /
    • 2014
  • In this paper, a concept design of a rail type ultra-high-speed train is proposed and its dynamic characteristics are analyzed. Instead of the existing solid axle, a new type bogie system and independently rotating wheels are applied in the proposed train. In order to analyze the dynamic characteristics, a multibody dynamic model of a vehicle is developed and the basic validity is verified by eigenvalue analysis. Also, it is shown that the critical speed is improved in comparison to that of existing high-speed train model HEMU-430X. Finally, through 7000R curved track driving analysis at a speed of 550 km/h, the lateral force of the wheels and the derailment quotient are estimated and the applicability of the new concept railway vehicle is confirmed.

A Software Development for the Dynamic Analysis of a High Mobility Tracked Vehicle (고속 궤도차량의 동역학 해석을 위한 소프트웨어 개발)

  • Lee, Byung-Hoon;Souh, Byung-Yil
    • Transactions of the Korean Society of Mechanical Engineers A
    • /
    • v.33 no.1
    • /
    • pp.89-97
    • /
    • 2009
  • In this paper, a computer software for dynamic analysis of a high mobility tracked vehicle with pre/post processor is developed. Model of a tracked vehicle is composed of chassis, turret, mount, gun, and road-wheel assembly. Track is modeled as an extensible cable and the track tensions are applied on the wheels as external forces. The system equations of motion and constraint acceleration equations are derived in the joint coordinate space using the velocity transformation method. The pre and post processors are developed using the Visual C++.

Review on the Dynamic Behavior of G7 High Speed Train(KHST) in the KTX Test Line (경부고속철도 시험선 구간에서 G7 고속전철 차량의 동특성 검토)

  • 박찬경;김영국;배대성;박태원
    • Journal of the Korean Society for Railway
    • /
    • v.4 no.4
    • /
    • pp.131-137
    • /
    • 2001
  • The dynamic behavior of high speed train is very important because of its safety and passengers' ride comfort. The railway vehicle is composed of many suspension components, such as 1st springs, 1st dampers, 2nd springs and 2nd dampers, that have an influence on the dynamic characteristics of high speed train. Also, the wheel/rail shapes and the track geometry affect the dynamic behavior of high speed train. This paper reviews the dynamic behavior of KHST in the KTX test line. The VAMPIRE program is used for this simulation. The simulation results are within the limits of safety criteria. Thus the KHST can operate safely at 350 km/h in the KTX test line.

  • PDF

Dynamic Characteristic Analysis of 3-Piece Freight Vehicle with Wedge Friction Damper Using ADAMS (ADAMS를 이용한 3-Piece 마찰 웨지 댐퍼가 장착된 화차의 동특성 해석)

  • Lee, Chul-Hyung;Han, Myung-Jae;Park, Tae-Won
    • Journal of the Korean Society for Railway
    • /
    • v.20 no.3
    • /
    • pp.299-310
    • /
    • 2017
  • In this work, an independent-load friction wedge model was developed using the ADAMS/View program to predict the performance of a freight vehicle with a bogie employing a 3-piece friction wedge. The friction wedge model can generate friction according to lateral and vertical directions of the bolster. The developed friction wedge model was applied to the ADAMS/Rail vehicle model, and results of the dynamic analysis showed a critical speed of 210km/h. In the linear safety analysis, it was confirmed that the lateral and vertical limit of acceleration of the vehicle were satisfied based on UIC518. In the 300R curve line, the application speed was 70km/h, which was satisfied with the limit acceleration of the car-body and bogie based on UIC518. Also, the developed model satisfied the wheel loading, lateral force and derailment coefficient of "The Regulations on Safety Standards for Railway Vehicles"

Performance Prediction of Tilting Actuator for 180km/h Korea Tilting Train (180km/h급 한국형 틸팅차량의 틸팅대차용 엑츄에이터 성능 예측)

  • Ko Taehwan;Kim Nam-Po;Han Seung-Ho
    • Proceedings of the KSR Conference
    • /
    • /
    • pp.455-460
    • /
    • 2003
  • 180km/h 급 한국형 틸팅차량의 틸팅 메카니즘 기구동역학 해석을 통하여 얻어진 틸팅 대차를 형성하는 주요 파라메터들의 값을 기반으로 틸팅대차용 엑츄에이터의 성능과 용량을 계산하여 설계에 결과를 반영하고자 한다. 승객의 안락감을 유지하기 위해 차체 틸팅 각가속도에 Sine 연속 함수를 적용하여 차체의 틸팅 제어 패턴을 결정하였으며, 이를 통해 차체의 틸팅 각속도와 틸팅각의 패턴을 얻어내었다. 또한 이번 연구를 통해 틸팅 메카니즘의 파라메타를 변화하면서 각각의 틸팅각에 따른 Swing bar 와 엑츄에이터에 작용되는 반발력에 대한 영향력을 분석, 검토하였으며, 이에 따른 엑츄에이터의 출력과 변위 속도등의 변화를 조사하였다. 이러한 결과와 틸팅 메카니즘 기구동력학 해석의 결과를 토대로 틸팅차량이 요구하는 최적의 틸팅 운동을 수행하는 파라메타를 결정하였다.

  • PDF

A Response Characteristic Analysis of Impact Acceleration Using Crash Dynamics Models (충돌동역학 모델링 기법에 따른 충돌가속도 응답특성 분석)

  • Cho, Hyun-Jik;Kim, Woon-Gon;Koo, Jeong-Seo
    • Proceedings of the KSR Conference
    • /
    • /
    • pp.1602-1606
    • /
    • 2008
  • In the Rail Safety Regulations article 16, deceleration rate in the survival spaces should be limited as far as is practicable to 5g, and shall not be more than 7.5g. As it is impractical to evaluate complete train behaviour by testing, the achievement of the objectives shall be validated by dynamic simulations corresponding to the reference collisions scenarios. But initial design and evaluation procedure, impact dynamics model which classified 1D and 2D is more useful than full scale model. This paper presents acceleration response characteristics between 1D and 2D dynamics model under head-on collision in standard collision scenarios.

  • PDF