• 제목, 요약, 키워드: Railway vehicle

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

  • 이찬우
    • 한국철도학회:학술대회논문집
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    • pp.245-250
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    • 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.

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Ramp장치를 이용한 철도차량 거동모드 주파수에 관한 연구 (A Study for behavior mode frequency of railway vehicle using ramp device)

  • 양희주;우관제;성재호
    • 한국철도학회:학술대회논문집
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    • pp.30-35
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    • 2010
  • The railway vehicle is a multi-body system running on the track which consists of carbody, bogie and wheelset, each of components is connected with rigid mass, spring and damper. each of components has translation motions of longitudinal (X axis), lateral(Y axis) and vertical(Z axis) direction, and rotation motions of X, Y, Z axis which are named Rolling, Pitching and Yawing. The vibration mode of railway vehicle is difficult to find the characteristics of motion during the operation on the track because these happen to independence or duplication motion caused by vehicle, wheel/rail and track irregularity etc. This paper presents the result of ramp test to show the bounce, roll, pitch and yaw mode frequency of the railway vehicle.

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

  • 이승일;손건호;최연선
    • 한국철도학회:학술대회논문집
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    • pp.417-422
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    • 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.

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축소형 철도차량의 설계변수에 따른 횡진동 해석 (Lateral Vibration Analysis for Design Parameter of the Scale Model of a Railway Vehicle)

  • 이승일;최연선
    • 한국소음진동공학회논문집
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    • v.16 no.12
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    • pp.1231-1237
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    • 2006
  • The vibration of a running railway 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 of the scale model of a railway vehicle. Also, the effects on the car-body, bogie and wheelset were examined for the weight and the stiffness of the second suspension system. The experimental results showed that the lateral vibration increases as the wheel conicity and stiffness of the second suspension system 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.

도시철도차량의 고가선로 비상대피 시나리오 분석 (Emergency Evacuation Scenario Study of Urban Metro Vehicle Running on Elevated Guideway)

  • 김영상;맹희영;왕종배
    • 한국안전학회지
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    • v.27 no.3
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    • pp.117-124
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    • 2012
  • There have been recently introduced new types of urban metro vehicles called LRT (Light Rail Transit) running on elevated guideway such as Uijeongbu VAL(which stands for V$\acute{e}$hicule Automatique L$\acute{e}$ger: Automatic Light Rail Vehicle) system, Yong-In LIM(Linear Induction Motor) system, Incheon international airport MAGLEV(Magnetic Levitated Vehicle) system and Daegu monorail system. Most of accidents by the vehicles are bound to happen on elevated guideway. Therefore, it is of vital importance to analyze hazards related to vehicles running on elevated guideway and study emergency evacuation scenarios applicable in case of accidents on elevated guideway so as to secure the safety of the new types of urban metro vehicles. In this study, FTA(Fault Tree Analysis) model was developed to identify all possible hazards, and all possible evacuation scenarios were studied. It was also confirmed that each hazard can be corresponded to one or more evacuation scenarios. This result shows that passengers can be evacuated according to one of the scenarios identified in this study in case of an accident of "Train Stranded on Elevated Guideway".

도시철도차량 적용을 위한 위험도 매트릭스 개발에 관한 연구 (The Study of Risk Matrix Development for Urban Metro EMU)

  • 김영상
    • 한국안전학회지
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    • v.26 no.6
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    • pp.111-117
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    • 2011
  • Risk-based railway safety management has been mandatory in Korea as by relevant laws and regulations enacted since the Railway Safety Act 2004. In particular, the Railway Vehicle Safety Guidance came into effect on Jan 1, 2008 specifies the details of methodology for hazard analysis, risk assessment and safety verification and validation. Fundamentals for success of the risk-based safety management are systematic hazard identification and risk assessment by use of reasonable risk assessment criteria, but the principle of risk-based safety management has not been applied in an effective way to introduction and maintenance of railway vehicle systems because definite risk assessment criteria have not been set down for each railway system or railway network. The purpose of this study is to suggest a risk matrix development principle for risk assessment of domestic urban metro vehicles by analyses of relevant rules and railway operating environment of Korea.

차륜 불평형이 있는 철도차량의 동적해석 (Dynamic Analysis of Railway Vehicle with Wheel Unbalance)

  • 이승일;최연선
    • 대한기계학회논문집A
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    • v.37 no.11
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    • pp.1387-1395
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    • 2013
  • 차륜 불평형은 차륜의 무게중심이 윤축의 기하학적 중심축에서 벗어나 있을 때 발생한다. 차륜 불평형을 수정하지 않고 주행하면 불평형에 의한 원심력이 차체의 진동을 발생시키게 되며 차륜의 마모를 촉진시키거나 차축 베어링에 손상을 주게 된다. 본 연구에서는 철도차량 동적해석을 통하여 차륜 불평형이 차량 임계속도와 차체 진동에 미치는 영향을 검토하였다. 차륜 불평형은 임계속도를 감소시키고 차체 공진을 유발할 수 있음을 알 수 있었다. 또한 차륜의 정적, 동적 불평형에 따른 차체진동을 해석함으로써 불평형 수정은 양면 밸런싱이 필요함을 밝혔다.

Dynamic response of railway vehicles under unsteady aerodynamic forces caused by local landforms

  • Chen, Zhengwei;Liu, Tanghong;Li, Ming;Yu, Miao;Lu, Zhaijun;Liu, Dongrun
    • Wind and Structures
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    • v.29 no.3
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    • pp.149-161
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    • 2019
  • When a railway vehicle runs in crosswinds, the unsteady aerodynamic forces acting on the train induced by the vehicle speed, crosswind velocity and local landforms are a common problem. To investigate the dynamic performance of a railway vehicle due to the influence of unsteady aerodynamic forces caused by local landforms, a vehicle aerodynamic model and vehicle dynamic model were established. Then, a wind-loaded vehicle system model was presented and validated. Based on the wind-loaded vehicle system model, the dynamic response performance of the vehicle, including safety indexes and vibration characteristics, was examined in detail. Finally, the effects of the crosswind velocity and vehicle speed on the dynamic response performance of the vehicle system were analyzed and compared.

철도차량의 Kinematic Envelope에 관한 연구 (A Study on the Kinematic Envelope of the Railway Vehicle)

  • 양희주;이강운;박길배
    • 한국철도학회:학술대회논문집
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    • pp.863-869
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    • 2002
  • Studied in this paper was the kinematic envelope of the railway vehicle to calculate the lateral displacement using the multi-body dynamic simulation program (VAMPIRE) and the BASS 501. The lateral displacement of railway vehicle is occurred by the clearance between wheel flange and rail, the track irregularity, the property of each suspension of vehicle and the cant of track etc. The results of analysis shown that Vehicle is not interfere with subway platform in any conditions namely the tare and full load condition, the wheel wear condition and the stationary and running of vehicle.

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철도차량용 공기스프링 신뢰성 평가기준 및 시험 (Reliability Evaluation of Air Spring for Railway Vehicle)

  • 우창수;김완두;김석원;김영구
    • 한국철도학회:학술대회논문집
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    • pp.597-603
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    • 2003
  • Air spring system in railway vehicles primarily ensure the air suspension of the vehicle body. The low natural frequency ensures a comfortable ride and an invariably good stiffness. In this paper, the characteristics and durability test was conducted in laboratory by using servo-hydraulic fatigue testing system to reliability evaluation of air spring for electric railway vehicle. The experimental results show that the characteristics and durability of domestic development productions are obtained the good results.

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