• 문화기술의 융합
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• 제4권3호
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• pp.213-220
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• 2018

본 연구에서는 레일이음매를 배제할 수 없는 각관형 레일을 사용하는 PRT궤도구조를 대상으로 레일이음매 설치위치 및 간격을 최적화함으로써 레일이음매부의 충격 및 승차감 저하 현상을 최소화 하고자 수치해석 및 현장측정을 통해 열차주행 시 PRT 차량의 실 열차속도를 고려한 궤도 구조의 일반부 및 레일이음매부의 동적거동을 파악하여 레일이음매의 적정간격을 산정하였다.

• 한국방재학회 논문집
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• 제7권1호통권24호
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• pp.29-38
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• 2007

틸팅차량의 안정성 확보를 위해 궤도부담력과 주행안정성 검토가 이루어졌으며, 틸팅차량이 궤도부담력과 주행안정성 검토에 의해 산정된 허용속도로 운행될 경우 레일이음매 하부 노반침하에 대한 연구가 수행되었다. 열차 주행시 레일이음매와 장대레일에 작용하는 충격량이 다르기 때문에 장대레일 하부 노반에 대한 안정성 검토가 추가적으로 필요하다. 본 연구에서는 장대레일에 대하여 노반의 침하량 및 지지력을 수치해석을 통해 검토하고 허용침하량 및 허용지지력과 비교하여 노반의 안정성을 검토하였으며 레일이음매와 장대레일 하부 노반의 침하량 및 지지력을 비교 분석하였다. 그 결과, 장대레일 및 레일이음부 하부 노반의 침하량은 허용침하량의 71.2% 및 88.8%, 응력은 허용지지력의 10.4% 및 12.1%로 나타났다.

• 한국철도학회지
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• 제5권3호
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• pp.15-21
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• 2002

옆의 사진을 보고 무엇을 느낄 수 있나\ulcorner 시속 30~40km/h의 열차가 레일이음매에서 발생하는 충격음을 내며 지나가고 있다. 여행 중 및 사람과 정다운 대화를 하면서 여행 그 자체를 즐기고 있다. 때로는 차장과 대화를 하면서 기관사를 신뢰하고, 안전하다는 믿음으로 여행을 한다. 가끔은 큰소리로 기적을 울려지지만 소음이라기 보다는 오히려 열차다운 면이기에 더욱 정이 간다. 느리다고 불평하는 사람도 없고, 궤도틀림으로 인한 진동이 심하다고 나무라는 사람도 없다. (중략)

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문초록집
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• pp.337.2-337
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• 2002

When vehicle travelling along the track which has irregularity such as vortical profile, dynamic forces arise at the Wheel/Rail contact patch by wheel/rail interaction. In particular short wavelength irregularities on dipped joint and small stiffness of connecting rail bring about intense wheel/rail dynamic effects at higher speed. In the paper, a new model for dipped joint rail is developed to study dynamic behavior of track. (omitted)

• 한국안전학회지
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• 제31권5호
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• pp.89-94
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• 2016

The objective of this study was to estimate the dynamic behavior of a personal rapid transit(PRT) track system using a rail of rectangular tube section and a rail joint of sliding type, and to compare the results with the normal rail and rail joint of a PRT track system by performing field measurements using actual vehicles running along the service lines. The measured vertical displacement of rail and sleeper, and vertical acceleration of rail for the normal rail and rail joint section were found to be similar, and the rail joint of sliding type satisfied the design specifications of the track impact factor for a conventional railway track. The experimental results showed that the overall dynamic response of the rail joint were found to be similar to or less than that of the normal rail, therefore the rail joint of sliding type for PRT track system was sufficient to ensure a stability and safety of PRT track system.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문집
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• pp.328-333
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• 2002

When vehicle travelling along the track which has irregularity such as vertical profile, dynamic forces arise at the Wheel/Rail contact patch by wheel/rail interaction. In particular short wavelength irregularities on dipped joint and small stiffness of connecting rail bring about intense wheel/rail dynamic effects at higher speed. In the paper, a new model for dipped joint rail is developed to study dynamic behavior of track. A cusp behavior on dipped joint was defined by its amplitude and decay factor, which was presented by FRA track classes. The result of case study are presented, which show wheel rail contact force in each track classes, train operation speed and bending flexible rigidity ratio of fishplates which are connecting the rail.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.1174-1179
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• 2004

Field tests were conducted to investigate effects of a rail joint on the dynamic behavior of railway bridge. A four-span simpled supported plate girder bridge which has a rail joint on the third span was selected for tests. At the operating train loading, the induced vibration of the first and third span has been examined. The dynamic magnification ratio was used for quantitative analysis of impact effects caused by rail joint. The result of tests show that dynamic behavior of railway bridge picked up considerably due to a rail joint.

• 한국철도학회논문집
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• 제2권2호
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• pp.13-20
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• 1999

The vibration signals of driving parts of electric train are distorted its signal patterns due to the impact components, which occurs when wheel passes rail joints. An elimination method of the impact components is investigated using adaptive signal processing technique in this study The result shows that adaptive interference canceling method seems to be more effective than line enhancement technique. The application of adaptive interference canceling method to the signal measured at bogie shows that the extractions of the signals of driving parts of traction motor, reduction gear, and axle bearing are successful. Therefore, only the signals of bogie, which is the place to attach an accelerometer easily, is sufficient for the fault diagnosis and the safety evaluation of electric train. Also, adaptive interference canceling method can be applicable to evaluate the performance of vibration isolation between bogie and car body and to investigate the characteristics of indoor sound.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 추계학술대회 논문집
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• pp.1028-1033
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• 2004

The open deck steel bridge is the most common type in railway bridges. Steel I-shaped girders are connected with sleepers directly without ballast and moving train loads are transmitted directly to the girder, so this bridge has weak characteristics on impact. Therefore, considerable accelerations can cause unsatisfactory dynamic behavior of the open deck steel bridge. Especially, Impact created at rail joints can increase the dynamic response of the bridge and this phenomenon would be injurious to passenger comfort. In the present study, dynamic behavior of the open deck steel bridge which has a rail joint is estimated through experimental studies and bridge-train interaction analysis considering surface irregularities by rail joints.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.2129-2134
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• 2011

This research increases efficiency of track-maintenance repair and cuts maintenance cost with relocating Continuous Welded Rail how to set up install criteria by comprehension analysis through an on-the-spot survey and track measurement about installing place at expansion joint of Continuous Welded Rail. This scope of this research is 427 places installed at Line No.1~4, Seoulmetro. We take a field study and select two spots. So we survey wheel-load, cross-load and railbed cross-resistance and suggest install criteria of expansion joint of Continuous Welded Rail through investigation and analysis of track facilities about neighboring section of expansion joint.