• 제목, 요약, 키워드: Rail Stability

검색결과 221건 처리시간 0.027초

한국고속철도 천안역사에 대한 소음 및 진동영향 연구 (Noise and Vibration Solutions Considering Stability Effects for High-Speed Rail ChonAn Station in Korea)

  • 권영철
    • 한국철도학회:학술대회논문집
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    • pp.848-853
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    • 2005
  • The objective of this paper is to address to the providing an adequate noise and vibration solution, required for High Speed Rail while maintaining the stability criteria of the ChonAn station structure, the first constructed in Korean High Speed Railway. The significant acoustic pressure level will be induced by the high speed trains passing-by. Therefore, the high level study of this case is necessary. The acoustic pressure level of 85 dB(A) inside the ChonAn station is expected, and the spaces below concrete slab are not suitable for commercial purpose, thus installation of filtering systems (spring boxes containing viscous dampers, ballast mats and acoustic shield) are provided to reduce the effect of the noise and vibration to acceptable level of 55 dB(A). But, a major drawback of application of the previously conducted experimental results was that the actual effect of installation of filtering system was never been validated. Therefore, the acquisition of noise and vibration on the present structure were obtained and compared to the computer simulations. These predicted the behavior of the station reasonably well. Also, the installation of filtering systems gave the superior reduction on noise and vibration. This application is successfully adapted without scarifying stability criteria related to the structural stability including excessive deformations or displacements. Three traffic operation safety limits: deck vertical acceleration, deflection of the structure, and longitudinal displacement of the slab were satisfactory.

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소형탈선시뮬레이터를 이용한 1/5 축소대차의 주행안정성 시험 (A Running Stability Test of 1/5 Scaled Bogie Using Small Scale Derailment Simulator)

  • 엄범규;이세용;이영엽;강부병;이희성
    • 한국철도학회:학술대회논문집
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    • pp.2600-2608
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    • 2011
  • The dynamic stability of railway vehicle has been one of the important issues in railway safety. The dynamic simulator has been used in the study about the dynamic stability of railway vehicle and wheel/rail interface. Especially, a small scale simulator has been widely used in the fundamental study in the laboratory instead of full scale roller rig which is not cost effective and inconvenient to achieve diverse design parameters. But the technique for the design of the small scale simulator for the fundamental study about the dynamic characteristics of the wheel-rail system and the bogie system has not been well developed in Korea. Therefore, the research about the development of the small scale simulator and the bogie has been conducted. As this paper, To predict the dynamic behavior of railway vehicle, we studied running stability test of 1/5 scaled bogie that similarity laws is applied using small scale derailment simulator. For the operation of the small scale derailment simulator, it is required to investigate the performance and characteristics of the system. This could be achieved by a comparative study between an analysis and an experiment. This paper presented the analytical model which could be used for verifying of the test results and understanding of the physical behavior of the dynamic system comprising the small scale bogie and the simulator.

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궤도 안정성에 대한 도상저항력과 궤도틀림의 민감도 (Sensitivity of the ballast resistance and track irregularity on the track stability)

  • 임남형;최상현;이진옥;성익현
    • 한국강구조학회 논문집
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    • v.17 no.5
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    • pp.519-526
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    • 2005
  • 혹서기에 레일의 높은 온도 상승(최대 $60^{\circ}C$)으로 인해 장대레일 궤도에는 매우 큰 압축력이 작용하게 된다. 이러한 압축력은 장대레일 궤도의 좌굴을 발생시키기도 한다. 본 연구에서는 장대레일 궤도의 좌굴에 영향을 미치는 많은 요소들 중에서 도상 횡저항력 그리고 도상 종저항력이 궤도 좌굴에 미치는 영향을 파악하기 위한 연구를 수행하였다. 또한 줄틀림과 궤간틀림의 민감도를 분석하였다.

경량전철 시스템 시험선 운영 방안 (Management Plan of Light Rail Transit System)

  • 이한민;이안호;한상욱
    • 대한전기학회:학술대회논문집
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    • pp.1657-1659
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    • 2005
  • Test track of the Light Rail Transit(LRT system was developed and organically combined with technologies of power supply system, signal communication system and track structure The purpose of the test track is a acquiring of reliability and stability through a sufficient performance test Therefore, this paper draws up ail management plans for tests of the LRT system

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자기부상 시스템의 성능개선 (The Improvement of Control Performance for a Magnetic Levitation System)

  • 김종문;강도현;박민국
    • 대한전기학회:학술대회논문집
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    • pp.864-866
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    • 2003
  • In this paper, the improvement of control performance for a magnetic levitation system is presented. The model of a single-magnet system with rail is derived. As a conventional controller, PID controller is designed and implemented. This controller has a narrow stability margin due to low-order controller structure so that it cause unstability for a flexible rail. So to improve the control performance and stability margin, a robust controller as a new controller is designed and implemented using a VME-based digital controller. As a result, the controller performance of the new designed controller is better than that of the conventional controller.

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분산형 고속전철의 임계속도 해석 (Critical speed analysis of the High-Speed EMU)

  • 신범식;이승일;이상원;구자춘;최연선
    • 대한기계학회:학술대회논문집
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    • pp.973-978
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    • 2008
  • This study concerned on the critical speed due to hunting and snake motion train to ensure the stability. First, the critical speed was calculated by using a numerical model, and calculated the critical speed of the vehicle through the simulation with the use of ADAMS/RAII. Also, the snake motion was confirmed through a modal analysis and running simulation. The calculated results, show that the rail irregularity becomes the influential factors of the stability since it is the direct source of excitation of the vehicle.

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불포화토이론을 이용한 강우시 열차운전규제기준 개발 (The Development of Rail-Transport Operation Control based on Unsaturated Soil Mechanics Concept)

  • 김현기;신민호;김수삼
    • 한국방재학회 논문집
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    • v.4 no.1
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    • pp.25-31
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    • 2004
  • 강우침투는 철도성토사면의 불안정성을 유발하는 요인으로 작용하여 때때로 파괴의 결과로 나타나게 된다. 강우량과 철도성토사면 안정성과의 기본적인 상관성이 강우에 의한 성토사면의 불안정성을 분석하여 제안되었다. 사면내부로의 강우침투속도를 규명하기 위하여 실내시험을 수행하였으며, 강우침투실험결과에서 강우침투량은 강우침투속도가 사면경사에 의해 지배되기 때문에 저수지 등의 경우에 있어서의 침투와는 상당히 다르다는 것을 알 수 있었다. 이와 같은 견과에 근거하여 강우의 경계조건을 변화시켜 적용한 후, 다양한 수치해석을 수행하였다. 이를 통해 강우시 철도 성토사면의 전단강도, 포화도 그리고 간극수압의 변화를 예측할 수 있었으며, 철도사면의 안전율이 강우량-강우지수의 함수로서 표현될 수 있었다. 따라서 이 강우지수가 강우시 열차운전규제기준을 설정하기 위해 유용함을 밝혔다.

고무차륜 경량전철 국산화 대차의 주행안정성 향상을 위한 동특성 해석 (Dynamic Analysis for Improvement of Running Stability of Rubber Tired AGT Localization Bogie)

  • 엄범규;이희성
    • 한국소음진동공학회논문집
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    • v.22 no.4
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    • pp.307-317
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    • 2012
  • The LRT(light rail transit) system, which has medium transport capacity between subway and bus is an advanced transportation system. It has many benefits like chap construction and operational cost down through driverless and flexible route planning. The rubber tired AGT(K-AGT) is a kind of LRT, which has rubber wheels and side guides. The side guides has many advantages, but brings vibration and noise problems from the friction between the guide rail and the wheels. This is the major source for the of passengers' discomfort. The purpose of this paper is to analyze dynamic characteries and running stability of the rubber tired AGT localization bogie if the AGT's speed is increased from 70 km/h to 80 km/h. The current design parameters of bogie suspension, as it is designed, was examined to satisfy the comfort index of the railway vehicle in performance test.

관절형 경량전철의 주행성능 해석 (Running Performance Analysis of an Articulated Light Rail Vehicle)

  • 허신;박찬경;한형석;하성도
    • 한국철도학회:학술대회논문집
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    • pp.159-166
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    • 1999
  • In this paper, running performance analyses of an articulated light rail vehicle are carried out using VAMPIRE software package. The stability analysis to determine the critical speed and the safety analysis such as derailment coefficients, lateral forces of wheels and reduction of wheel load are carried for the track conditions of straight, transition and curving range to the operating velocity of 40km/h. Also, ride quality is analyzed. As the results of analysis, the safety of light rail vehicle satisfied with the limit values and the ride quality for tare and full load condition was shown to the "not uncomfortable" level in ISO 2631-1 (1997) criteria.

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반복하중을 받는 철도노반보수용 샌드백의 거동분석 (Behavior of Sand Bag for Maintenance Railroad Bed Subjected to Cyclic Loading)

  • 신은철;황선근;이동현;류인기
    • 한국철도학회:학술대회논문집
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    • pp.1033-1040
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    • 2004
  • Utilizing of the geotextile container shows several advantages such as standardized construction, factory manufactured products, the control of quality, workability. and economical point of view. Recently this technique can be applied to rehabilitate the loss of rail roadbed due to the heavy rainfall. In this study, a large-scale laboratory test were conducted with simulation of static performance on the geotextile container reinforced rail roadbed. Based on the laboratory test results, the vertical pressure distribution with respect to the depth, and settlement of rail roadbed were measured and compared test results between geotextile container reinforced case and unrein forced case. Thus, the effectiveness of reinforcement was evaluated in terms of its performance and stability.

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