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논문 기본 정보

자료유형
학술대회자료
저자정보
양신추 (한국철도기술연구원) 김은 (한국철도기술연구원)
저널정보
한국철도학회 한국철도학회 학술발표대회논문집 한국철도학회 2010년도 춘계학술대회논문집
발행연도
2010.7
수록면
50 - 57 (8page)

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초록· 키워드

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Various installation faults may lie in fasteners in the construction of a direct-fixation track by the top-down method. At an extreme, they may cause excessive interaction between the train and track, compromise the running safety of the train, and cause damage to the track components. Therefore, the faults need to be kept within the allowable level through an investigation of their effects on the interactions between the train and track. In this study, the vertical dynamic stiffness of fasteners in installation faults was measured based on the dynamic stiffness test by means of an experimental apparatus that was devised to feasibly reproduce gap faults. This study proposes an effective analytical model for a train?track interaction system in which most elements, except the nonlinear wheel?rail contact and some components that behave bi-linearly, exhibit linear behavior. To investigate the effect of the behavior of fasteners in gap faults in a direct-fixation track on the vehicle and track, vehicle-track interaction analyses were carried out, targeting key review parameters such as the wheel load reduction factor, vertical rail displacement, rail bending stress, and mean stress of the elastomer. From the results, it was noted that the gap faults in the concrete bearing surface of a direct-fixation track need to be limited for the sake of the long-term durability of the elastomer than for the running safety of the train or the structural safety of the track.

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ABSTRACT
1. 서론
2. 결함개소의 체결구 동적강성시험
3. 차량/궤도 상호작용해석
4. 결론
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UCI(KEPA) : I410-ECN-0101-2010-326-002757926