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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.80 No.5
- 발행연도
- 2021.12
- 수록면
- 491 - 501 (11page)
이용수
초록· 키워드
오류제보하기
A difference in subgrade settlement between two rails of a track manifests as lateral differential subgrade settlement.
This settlement causes unsteadiness in the motion of trains passing through the corresponding area. To illustrate the effect of lateral differential subgrade settlement on the dynamic response of a vehicle-track coupling system, a three-dimensional vehicletrack- subgrade coupling model was formulated by combining the vehicle-track dynamics theory and the finite element method.
The wheel/rail force, car body acceleration, and derailment factor are chosen as evaluation indices of the system dynamic response. The effects of the amplitude and wavelength of lateral differential subgrade settlement as well as the driving speed of the vehicle are analyzed. The study reveals the following: The dynamic responses of the vehicle-track system generally increase linearly with the driving speed when the train passes through a lateral subgrade settlement area. The wheel/rail force acting on a rail with a large settlement exceeds that on a rail with a small settlement. The dynamic responses of the vehicle-track system increase with the amplitude of the lateral differential subgrade settlement. For a 250-km/h train speed, the proposed maximum amplitude for a lateral differential settlement with a wavelength of 20 m is 10 mm. The dynamic responses of the vehicle-track system decrease with an increase in the wavelength of the lateral differential subgrade settlement. To achieve a good operation quality of a train at a 250-km/h driving speed, the wavelength of a lateral differential subgrade settlement with an amplitude of 20 mm should not be less than 15 m. Monitoring lateral differential settlements should be given more emphasis in routine highspeed railway maintenance and repairs.
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참고문헌 (28)
참고문헌 신청
1995 / 95J01-M, Code for Strength and Dynamics of High-Speed Test Train Passenger Car / Ministry of Housing and Urban-Rural Development of the People’s Republic of China
Chen, Z. / 2018 / Analysis of structural stresses of tracks and vehicle dynamic responses in train-trackbridge system with pier settlement / Proc. Inst. Mech. Eng. Part F : J. Rail Rap. Trans 232(2):421~434
Di, H. / 2021 / In situ grouting tests for differential settlement treatment of a cut-and-cover metro tunnel in soft soils / Bull. Eng. Geol. Environ 80:6415~6427
Gou, H. / 2020 / Mapping relationship between dynamic responses of high-speed trains and additional bridge deformations / J. Vib. Control 27(9-10):1051~1062
Guo, Y. / 2016 / Mapping relationship between subgrade settlement and rail deflection of the double-block ballastless track / J. Chin. Railw. Soc 38(9):92~100
Chen, Z. / 2018 / Analysis of structural stresses of tracks and vehicle dynamic responses in train-trackbridge system with pier settlement / Proc. Inst. Mech. Eng. Part F : J. Rail Rap. Trans 232(2):421~434
Di, H. / 2021 / In situ grouting tests for differential settlement treatment of a cut-and-cover metro tunnel in soft soils / Bull. Eng. Geol. Environ 80:6415~6427
Gou, H. / 2020 / Mapping relationship between dynamic responses of high-speed trains and additional bridge deformations / J. Vib. Control 27(9-10):1051~1062
Guo, Y. / 2016 / Mapping relationship between subgrade settlement and rail deflection of the double-block ballastless track / J. Chin. Railw. Soc 38(9):92~100
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