• 제목/요약/키워드: Railway vehicle

검색결과 672건 처리시간 0.149초

축소형 차량의 횡진동 해석 (Lateral Vibration Analysis of a Small Scale Railway Vehicle Model)

  • 이승일;손건호;최연선
    • 한국철도학회:학술대회논문집
    • /
    • /
    • pp.417-422
    • /
    • 2004
  • The vibration of a running vehicle can be classified on lateral, longitudinal and vertical motions. The important factor on the stability and ride quality of a railway vehicle is the lateral motion. The contact between wheel and rail with conicity influences strongly on the lateral motion. In this study, an experiment for the vibration of a running railway vehicle was performed using a small scale railway vehicle model. Also, the effects on the car body, bogie and wheelset were examined for the weight and the stiffness of the first and second suspension. The experimental results showed that the lateral vibration increases as the wheel conicity and stiffness of the second suspension increase. And the lateral vibration of the bogie increases as the mass ratio between car body and bogie increases. Also, the lateral vibration of the wheel becomes high at low speed, while the wheel of 1/20 conicity makes severe vibration at high speed running.

  • PDF

Running Characteristics for On-Line Test of Railway Vehicle

  • Han, Young-Jae;Kim, Seog-Won;Seo, Sung-Il;Mok, Jin-Yong;Lee, Su-Gil;Kim, Young-Mo
    • 제어로봇시스템학회:학술대회논문집
    • /
    • /
    • pp.1347-1350
    • /
    • 2005
  • Recently, as the road capacity reaches a limit and environmental problems become serious, there exists a gradual increasing need for railway vehicles that are environment-friendly, punctual, reliable and safe. Accordingly, in addition to conventional railroad vehicles, lots of vehicles are being newly developed. Using the developed installed measurement system, the performance characteristics of railway vehicle could be monitored precisely. After recording the input real time data of each signal from railway vehicle to the network line, we could acquire the needed information through post processing program. We could verify the running performances of railway vehicle using this system. As a result, many latent defects have been found and corrected in the prototype train. The measurement systems have contributed to dramatic reduction of the developing period.

  • PDF

고속철도차량 충돌 및 탈선 안전도 평가 연구 (High-speed Railway Vehicle Collision and Derailment Safety Evaluation Research)

  • 이찬우
    • 한국철도학회:학술대회논문집
    • /
    • /
    • pp.245-250
    • /
    • 2006
  • From the research which it sees the safety regarding a high-speed railway vehicle collision and a derailment evaluation research it an example and executed. Japan, France, Germany and Spain, Italy and with our country together it compared a high-speed railway vehicle collision of the high-speed railroad operating nation and derailed relation safety standard and safety against the evaluation system trade name comparison it analyzed. The research which it sees it led and the accident instance against the hazard analysis against the collision and a derailment of the high-speed railway vehicle and a risk evaluation together and a high-speed vehicle collision and derailed it cannot prevention plan from hereafter domestic comparison it analyzed forecast it presented.

  • PDF

현가특성 변화에 따른 도시형 전동차의 임계속도 선형해석 (Linear Analysis of the Critical Speed for an Urban Railway Vehicle according to the Change of Suspension Characteristics)

  • 박준혁;허현무;유원희
    • 한국철도학회:학술대회논문집
    • /
    • /
    • pp.251-257
    • /
    • 2007
  • This paper describes the variation of the critical speed of an urban railway vehicle according to the change of suspension characteristics. Suspensions of a railway vehicle are composed of primary and secondary suspensions. Generally, main focus of the stability analysis has been the primary suspension. However, secondary suspension has large effects on the stability as well as the ride quality of a vehicle. In this paper, stability of an urban railway vehicle is discussed in relation to the variation of characteristics of both primary and secondary suspension. For this, modal analysis is carried out using a linear dynamic model of a half vehicle and a polynomial fit for Kalker's creep coefficients. Stability along with change of the effective conicity of a wheel is also investigated.

  • PDF

MR댐퍼를 이용한 철도 차량의 진동제어 및 조향성능 고찰 (Vibration Control and Steering Performance Evaluation of Railway Vehicle Using Magnetorheological Damper)

  • 하성훈;최승복;유원희
    • 한국소음진동공학회논문집
    • /
    • v.18 no.5
    • /
    • pp.524-532
    • /
    • 2008
  • This paper presents yaw vibration control performances of railway vehicle featuring controllable magnetorheological damper. A cylindrical type of MR damper is devised and its damping force is evaluated by considering fluid resistance and MR effect. Design parameters are determined to achieve desired damping force level. The MR damper model is then incorporated with the governing equations of motion of the railway vehicle which includes vehicle body, bogie and wheel-set. Subsequently, computer simulation of vibration control via proportional-integral-derivative(PID) controller is performed using Matlab. Various control performances are demonstrated under external excitation by creep force between wheel and rail.

간이잔향실을 이용한 철도차량 바닥재의 음향투과손실 측정 (Sound transmission loss measurement of railway vehicle floor using semi-reverberation room)

  • 신범식;천광욱;최연선
    • 한국철도학회:학술대회논문집
    • /
    • /
    • pp.1420-1425
    • /
    • 2008
  • This study is to examine the sound transmission loss of a railway vehicle floor. To this end, a semi-reverberation room was constructed. The semi-reverberation room was made of a railway vehicle floor between the sound radiating chamber and the sound receiving chamber. To block the sound, the wall was made of acryl, urethane foam, wood, and glass fiber. The test followed the KS F 2808 standard, and a typical reverberation room was used to verify the performance of the semi-reverberation room. As a result, comparison of the measurements showed that the test results of the semi-reverberation room had the same tendency as those of the reverberation room. Consequently it was possible to measure the sound transmission loss of railway vehicle structures using the semi-reverberation room.

  • PDF

분산형 고속전철의 34자유도 동역학적 모델링을 통한 철도차량의 동적 특성 해석 (Dynamic Analysis of Railway Vehicle Using Mathematical Modeling of High-Speed EMU)

  • 이래민;이필호;이상원;구자춘;최연선
    • 한국철도학회:학술대회논문집
    • /
    • /
    • pp.1426-1434
    • /
    • 2008
  • This paper addresses the numerical study on the dynamics of the High-speed EMU to enhance the ride quality. The 17 and 34 degrees-of-freedom (DOF) dynamic models for a single railway vehicle are proposed, and its vibrational characteristics according to the nonuniform rail profile are analyzed via Matlab. The validity of the proposed 34-DOF model are verified by comparing its dynamic characteristics and those from ADAMS/Rail. In addition, the critical dynamic parameters are identified by the parametric analysis, and rough design variables to reduce the vibration level of the railway vehicle are proposed. Finally, the frequency analysis - FFT - are conducted to extract the resonant frequencies, which have a significant influence on the determination of the critical speed of the railway vehicle. It is demonstrated that the results from the Matlab-based numerical analysis of the 34-DOF dynamic model are similar to those from ADAMS/Rail.

  • PDF

철도차량의 RCM 분석을 위한 유지보수비용 산출방안 (Calculation of Maintenance Cost for RCM Analysis of Railway Vehicle)

  • 이창환;박병노;임성수
    • 한국철도학회:학술대회논문집
    • /
    • /
    • pp.1481-1486
    • /
    • 2008
  • To apply more effective the RCM analysis for railway vehicle, the maintenance cost per equipment should be considered together with failure criticality per equipment considered in existing. This paper is described the systematic calculation of maintenance cost considering the RCM analysis of railway vehicle. To calculate the maintenance cost systematically, the cost breakdown structure was established, and basic cost information and calculated cost items were defined. In addition, the linking between calculated cost and RCM analysis was considered. In future, this proposal would be used to analysis of cost effectiveness through RCM analysis of railway vehicle.

  • PDF

상사기법을 이용한 차량시뮬레이터 기초 설계 (Preliminary design of a scaled railway vehicle simulator)

  • 김홍찬;김정태;이희성;오세빈
    • 한국소음진동공학회:학술대회논문집
    • /
    • /
    • pp.951-956
    • /
    • 2008
  • The study is to develop a foundation design for a railway vehicle simulator using a scaled model. Although a scaled simulator is limited to manipulate the dynamics of a full-size railway vehicle, it has been known to have an advantage, since a scaled model could provide the fundamental dynamic behavior within a limited space of a laboratory facility and with a low operation cost while an experiment is conducted. This study is to propose a design strategy for a simulator so that a small scaled roller rig could be fabricated in a laboratory based on the design philosophy. The data obtained from the scale model is also experimentally investigated in conjunction with appropriate non-dimensional analysis so that the output results should be interpreted to the railway vehicle.

  • PDF

철도차량 AI 하부구조의 MIG 용접 조건에 따른 기계적 특성에 관한 연구 (Mechanical Properties of Metal Inert Gas Welding Conditions of Railway-Vehicle Aluminum Under Frame)

  • 정상호;김해지
    • 한국기계가공학회지
    • /
    • v.20 no.6
    • /
    • pp.17-25
    • /
    • 2021
  • In this study, the mechanical properties of railway-vehicle aluminum under frame was investigated based on the metal inert gas (MIG) welding conditions. An aluminum-alloy (6005A-T6) extruded material used in the lower panel of a railway vehicle was connected through MIG welding to determine the mechanical properties of MIG welds. Argon shielding gas and filler materials, such as ER5356 and ER4043, were used as consumable welding materials. For the welding conditions of the test specimen, welding frequencies of 2.5 and 4.5 Hz were applied using the SynchroPuls function, and the root faces were 1.0 and 1.5 mm. The mechanical properties of the MIG welds were determined through tensile, bending, and fatigue tests.