• 제목/요약/키워드: Bogie

검색결과 488건 처리시간 0.021초

고속화차용 용접대차의 구조강도해석 (The structural analysis of bogie for high speed freight car)

  • 황원주;함영삼;권성태;허현무;전응식
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2001년도 춘계학술대회 논문집
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    • pp.217-221
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    • 2001
  • Barber bogie and Y25 bogie is the main bogie of freight car which is used in the Korean railway. In case of Barber bogie and a mixed formation tile maximum speed limit of empty car is 70 km/h and that of loaded car is 90 km/t and also it runs a speed of 110 km/h in time of an exclusive formation of Y25 bogie. The car named as high speed freight car at present is Y25 bogie which modeled on the Y25 bogie or Europe developed in 1993, Y25 bogie has no problem about the running capacity up to the speed of 110 km/h, but it works as limiting factors to tile increasing cost of maintenance and repair expenses which caused by repair of bogie and the cost of materials. This study is going to describe the contents examined by analysis and tests, aimed at being used as an index of plan in the future through the strength test of high speed freight car which is used now.

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고속열차의 대차불안정감지센서 시험에 대한 연구 (The Bogie Bunting Sensors quality Inspection)

  • 차근수;전성준;손강호
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2009년도 춘계학술대회 논문집 특별세미나,특별/일반세션
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    • pp.603-612
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    • 2009
  • The bogie hunting sensor detects accelerations of a bogie. It transmits those accelerations using frequency modulated signal to the TCMS(Train Control and Management System) electronics for functional processing. TCMS decide undesirable bogie hunting and high speed instability with frequency modulated signal. The bogie hunting sensor is essential component for safety driving of high speed train. The bogie hunting sensor's quality inspection before sensor is installed on bogie is very important. Therefore it is required equipment for exact inspection of train bogie hunting sensor. This study is about development of Bogie Hunting sensor's inspection equipment that we can improve Bogie Hunting sensor's quality. Accordingly, I suppose that this thesis will be utilized to improve the bogie hunting sensor's quality thru exact inspection.

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동력차용 대차프레임의 피로강도평가 (Fatigue Strength Evaluation of Bogie Frame for Power Car)

  • 이학주;한승우;;이상록
    • 연구논문집
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    • 통권27호
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    • pp.57-73
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    • 1997
  • The bogie between the track and the railway vehicle body, is one of the most important component in railroad vehicle. Its effects on the safety of both passengers and vehicle itself, and on the overall performance of the vehicle such as riding quality, noise and vibration are critical. The bogie is mainly consisted of the bogie frame, suspensions, wheels and axles, braking system, and transmission system. The complex shapes of the bogie frame and the complicate loading condition (both static and dynamic) induced in real operation make it difficult to design the bogie frame fulfilling all the requirements. The complicated loads applied to the bogie frame are i) static load due to the weight of the vehicle and passengers, ii) quasi-static load due to the rolling in curves iii) dynamic load due to the relative motion between the track, bogie, and vehicle body. In designing the real bogie frame, fatigue analysis based on the above complicated loading conditions is a must. In this study, stress analysis of the bogie frame has been performed for the various loading conditions according to the UIC Code 6 15-4. Magnitudes of the stress amplitude and mean stress were estimated based on the stress analysis results to simulate the operating loads encountered in service. Fatigue strength of the bogie frame was evaluated by using the constant life diagram of the material. 3-D surface modelling, finite element meshing, and finite element analysis were performed by Pro-Engineer, MSC/PATRAN, and MSC/NASTRAN, respectively.

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경량전철 대차 선회프레임의 정적강도와 피로특성 분석 (Static and Fatigue Analysis of Bogie Rotating Frame for Light Rail Train)

  • 구정서;조현직;송달호
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2001년도 추계학술대회 논문집
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    • pp.253-260
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    • 2001
  • Rotating bogie frame will be used in the bogie for the Light Rail Train being developed. In development of the bogie, analyzed were the structural strength and fatigue characteristics of the rotating bogie frame. Defined load cases were applied for the analysis. No part of the rotating bogie frame is subjected to stress beyond the fatigue endurance limits of the material used when grinding the weldment of the lower plate link bend. It is concluded that the rotating bogie frame is considered safe in the view of the structural strength.

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고속화차용 용접대차 프레임 개선모델의 강도평가 (The Estimation of Structural Strength of Improved Frame of Welded Bogie for High Speed Freight Car)

  • 황원주;함영삼;강부병;전응식
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2001년도 추계학술대회 논문집
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    • pp.235-239
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    • 2001
  • The bogie of high speed freight car running on conventional line is welded bogie modeled on Y25 bogie developed in Europe. Y25 bogie has speed limit of 110km/h. But it has limiting factors to speed-up as increasing maintenance cost and friction parts pedestal. And also it was reported that cracks are found in the parts where center beam meet bolster and endbeam near bracket for braking part. This study includes stress analysis improved structure of welded bogie for strength evaluation by numerical method and experimental method. According to the study, new configuration bogie shows improvement in strength.

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전동차용 인보드 대차 시스템에 대한 고찰 (The Study of the System of In-Board Bogie for EMU)

  • 김철근;오형식;정훈
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2003년도 춘계학술대회 논문집
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    • pp.592-596
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    • 2003
  • In general the limit of EMU bases on the construction gauge. But to save the cost for construction, there is often a case that the gauge of construction for bogie is narrower than the existing gauge. Finally, out-board bogie type cannot be applicable because of the space. In this case, we can use the in-board bogie type which the support distance of both suspensions is narrower than out-board bogie. But we cannot use an in-board bogie indifferently because car with in-board bogie must also have the same performance as out-board bogie in wider gauge. Accordingly, we have to consider how many moments in the suspensions are applied due to the narrower support distance. And the characteristics of suspensions in the in-board bogie must be decided from the moments.

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Effect of bogie fairings on the snow reduction of a high-speed train bogie under crosswinds using a discrete phase method

  • Gao, Guangjun;Zhang, Yani;Zhang, Jie;Xie, Fei;Zhang, Yan;Wang, Jiabin
    • Wind and Structures
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    • 제27권4호
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    • pp.255-267
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    • 2018
  • This paper investigated the wind-snow flow around the bogie region of a high-speed train under crosswinds using a coupled numerical method of the unsteady Realizable $k-{\varepsilon}$ turbulence model and discrete phase model (DPM). The flow features around the bogie region were discussed and the influence of bogie fairing height on the snow accumulation on the bogie was also analyzed. Here the high-speed train was running at a speed of 200 km/h in a natural environment with the crosswind speed of 15 m/s. The mesh resolution and methodology for CFD analysis were validated against wind tunnel experiments. The results show that large negative pressure occurs locally on the bottom of wheels, electric motors, gear covers, while the positive pressure occurs locally on those windward surfaces. The airflow travels through the complex bogie and flows towards the rear bogie plate, causing a backflow in the upper space of the bogie region. The snow particles mainly accumulate on the wheels, electric motors, windward sides of gear covers, side fairings and back plate of the bogie. Longer side fairings increase the snow accumulation on the bogie, especially on the back plate, side fairings and brake clamps. However, the fairing height shows little impact on snow accumulation on the upper region of the bogie. Compared to short side fairings, a full length side fairing model contributes to more than two times of snow accumulation on the brake clamps, and more than 20% on the whole bogie.

조향대차의 곡선선로 주행시 조향성능 검토 (Verifying of steering performance of the steering bogie)

  • 김정하;양희주;안재광
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2011년도 춘계학술대회 논문집
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    • pp.1069-1073
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    • 2011
  • When the train is running on the small curved line, there would be severe contact between the rail and wheels, which cause noise and vibration as well as abnormal wear on the rail and the wheels. In order to solve these problems, the steering bogie has been developed. To verify steering performance of the steering bogie, steering angles of two trains, one is the advanced EMU with the steering bogie, another is a conventional EMU with the conventional bogie, were measured while running on the small curve. this comparing test shows that the steering bogie has much higher steering performance than the conventional bogie on the same curved line. To verify more performance data of the steering bogie, further testing and monitoring will be done with the advanced EMU in the test track.

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경량전철 대차 선회프레임의 정적강도와 피로특성의 분석 (Static and Fatigue Analysis of Bogie Rotating Frame for a Light Rail Train)

  • 구정서;한형석;조현직;송달호
    • 한국철도학회논문집
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    • 제5권4호
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    • pp.222-230
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    • 2002
  • The rotating bogie frame is used in the bogie for a Light Rail Train under development in Korea. In development of the bogie, the structural strength and fatigue characteristics of the rotating bogie frame have been evaluated under the predefined load cases according to the Korean standards for a urban EMU. No part of the rotating bogie frame was subjected to stress beyond the fatigue endurance limits of the material used when grinding the welding of the lower plate link. It is concluded that the rotating bogie frame is safe in view of its static and fatigure strength.

고속주행용 화차 대차의 주행안전성 (Running Safety of High Speed Freight Bogie)

  • 이승일;최연선
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2001년도 추계학술대회 논문집
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    • pp.179-186
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    • 2001
  • As the freight traffic becomes heavier, the high speed of existing freight cars is essential instead of the construction of a new railway. The high speed can be achieved by the design modifications of the freight bogie. In this paper, an analytical model of freight bogie including the lateral force between rail and the flange of wheel is developed to decide the critical speed, which activates a hunting motion and tells the running safety of freight bogie. The dynamic responses of the analytical model were compared with an experimental data from a running test of a freight bogie and showed good agreements between them. The analytical model is used to find the design modifications of the freight bogie by parameter studies. The results show that the reduction of wheelset mass ratio and the increase of the axle distance of the freight bogie can increase the critical speed, but the primary lateral stiffness has little effects on the critical speed. And this also study shows that smaller wheel conicity deteriorates the running safety of the freight car, which means the overhauling of the wheel of freight bogie should be done regularly.

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