• 제목, 요약, 키워드: Railway vehicle

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

  • 신범식;천광욱;최연선
    • 한국철도학회:학술대회논문집
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    • pp.1420-1425
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    • 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.

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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
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    • pp.1426-1434
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    • 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.

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

  • 이창환;박병노;임성수
    • 한국철도학회:학술대회논문집
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    • pp.1481-1486
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    • 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.

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도시형 자기부상열차에 대한 철도안전법과 도시철도안전법의 충돌안전기준 적용의 비교 연구 (Comparative Study on Application of Korean Railway Safety Law and Urban Transit Safety Law to Urban Maglev Vehicle in Crashworthiness Regulations)

  • 이현철;구정서
    • 한국철도학회:학술대회논문집
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    • pp.748-754
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    • 2008
  • This paper studied on the application of Korean Railway Safety Law and Urban Transit Safety Law in Crashworthiness Regulations to the urban maglev vehicle of KIMM. The crashworthiness regulations for urban transit vehicle should be satisfied to the urban maglev vehicles according to crash analysis results using the explicit finite element method. However, according to its numerical results, the crashworthiness regulations of Korean Railway Safety Law were partially satisfied except the coupling and shunting condition. When a commercial urban maglev vehicle is developed in the near future, the crashworthiness regulations of Korean Railway Safety Law should be considered and satisfied during its structural design stage in some details

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다물체 동역학 해석방법을 이용한 철도차량의 임계속도 계산 (Calculation of Critical Speed of Railway Vehicle by Multibody Dynamics Analysis)

  • 강주석
    • 대한기계학회논문집A
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    • v.37 no.11
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    • pp.1371-1377
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    • 2013
  • 본 연구에서는 다물체 동역학 모델을 이용한 철도차량의 임계속도 계산 방법을 제시하였다. 휠과 레일의 접촉 구속조건과 접촉력을 휠셋 단위에서 수식화하였다. 이를 대차모델에 합하여 구속조건을 가진 다물체 동역학 운동방정식으로 철도차량의 동적모델을 표현하였다. 철도차량의 다물체 동역학 모델에 대한 비선형 구속조건식과 운동방정식은 QR 분해법을 이용하여 독립좌표만으로 이루어진 선형방정식으로 유도하였다. 유도된 선형방정식으로부터 휠셋 및 이륜 대차에 대한 고유치 해석결과를 통해 임계속도를 구하였다. 임계속도에 영향을 미치는 차량 파라미터의 영향에 대한 결과를 제시하였다.

고속전철 주행시 이선에 따른 전원외란 현상 모델링 및 시뮬레이션 구현 (A Modeling and Simulation Implementation on the Power Line Disturbances by Loss of Contact for the High-Speed Railway Vehicle)

  • 김재문;김양수;장진영;김윤명
    • 한국철도학회:학술대회논문집
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    • pp.1137-1142
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    • 2008
  • In this paper, an effect on power conversion unit in high-speed railway vehicle by loss of contact between a catenary system and pantograph suppling electrical power to high-speed railway vehicle are investigated. One of the most important needs accompanied by increasing the speed of high-speed railway vehicle is reduced that arc phenomenon by loss of contact brings out EMI. in case of high-speed railway vehicle using electrical power, as comparison with diesel rolling stock, PLD(Power Line Disturbance) such as harmonic, transient voltage and current, EMI, dummy signal injection etc usually occur. To analysis the effect on loss of contact, it is necessary electrical modeling system between the contact line and the pantograph according to the loss of contact. Therefore analytical model of a contact line and a pantograph is constructed to simulate the behaviour of loss of contact. The reliability of the modeling system is verified by simulation implementation on kinds of loss of contact.

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철도차량의 Roll 특성에 관한 연구 (A Study for Roll characteristic of Railway Vehicle)

  • 양희주;이강운;박길배;성재호
    • 한국철도학회:학술대회논문집
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    • pp.1184-1189
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    • 2006
  • Railway vehicle have three translational motions-longitudinal, vertical and lateral, and three rotational motions-rolling, pitching and yawing caused by track irregularity, wheel and rail characteristic, dynamic behaviors etc. The rolling motion in vehicle mainly happens in cases of the vehicles stationary and running on canted track. When the vehicle positioned in stationary on canted track, vehicle is inclined toward inside of installed cant due to gravity component. When the vehicle has running on a track with cant deficiency, vehicle is inclined toward outside of installed cant due to centrifugal force. The roll coefficient(s) is defined as the ratio between the angle of inclination of the vehicle($\eta$) and the angle of the rail level($\alpha$). This paper has noted the test method, test result and analysis result to calculate the roll coefficient according to UIC505-5, international standard

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철도차량 고무 현가부품의 내한성 시험기준연구 (A Study on the Test Standards at Low Temperature of Rubber Suspension Components of Railway Vehicle)

  • 윤태호;장승호;최병일;이찬우;나희승
    • 대한기계학회:학술대회논문집
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    • pp.372-376
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    • 2004
  • In this paper, the standard test methods at low temperature of rubber suspension components of railway vehicle are investigated and reviewed. In order to connect the TKR(Trans-Korean Railway)-TSR(Trans-Siberian Railway), it is necessary to evaluate the performance of rubber suspenion components of railway vehicle. In the current Korean Standard, the test method at low temperature of railway vehilce components and the test method of rubber bellows of air spring are specified. But, the specified test temperature is higher than the the operating temperature of TSR railway. So, the in-depth research for the test method and performance evaluation technique of rubber suspension component at low temperature is necessary and current KS code should be adjusted.

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철도차량 충돌 해석을 위한 축소모델링 기법 연구 (Scale Modeling Technique for the Crash Analysis of Railway Vehicle Structure)

  • 김범진;허승진
    • 한국철도학회논문집
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    • v.5 no.4
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    • pp.231-236
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    • 2002
  • Todays, crash safety requirements of the railway vehicle structures become important design criterion according to the increased driving speed and the lightweight construction. Although the crash analysis using computer simulation can be effectively applied to predict the crash performance of the railway vehicles in the early design stage, the optimized design w.r.t the crash safety could be realized by the crash tests with actual prototype vehicles. However, it is very expensive and time-consuming task to perform the crash test of the railway vehicles. As a measure to cope with the problem, in this paper, the scale modeling technique is suggested and experimentally verified to predict the impact energy absorption characteristics of full scale model of aluminum extrusions sub-structures and the high-speed railway vehicle structure.

유지보수를 고려한 철도차량 운용계획에 관한 연구 (A Study on the Rolling Stock Scheduling considering maintenance activities in Railway)

  • 김동회;홍순흠
    • 한국철도학회:학술대회논문집
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    • pp.280-285
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    • 2003
  • The process of railway traffic planning is composed of several steps such as long-term, mid-term. short-term, and real-time plan. The planning of vehicle and manpower resources is a main research topic in tactical short-term planning step. Railway vehicle is usually consisted of a power car, passenger/freight cars and human resource is composed of engine driver, cabin crew, ground personnel. So far, power car was main research target in railway vehicle scheduling problem. Recently according as the light electric railway or high-speed railway is introduced, the operational planning of trainset vehicles become important, In this paper, we introduce the conceptional model for trainset restoring problem and developed heuristic algorithm.

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