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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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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.77 No.2
- 발행연도
- 2021.1
- 수록면
- 231 - 243 (13page)
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초록· 키워드
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In this paper, a dynamic response mapping model of the wheel-rail system is established by using the support vector regression (SVR) method, and the hierarchical safety thresholds of the subgrade void are proposed based on the reliability theory. Firstly, the vehicle-track coupling dynamic model considering the subgrade void is constructed. Secondly, the subgrade void area, the subgrade compaction index K30 and the fastener stiffness are selected as random variables, and the mapping model between these three random parameters and the dynamic response of the wheel-rail system is built by using the orthogonal test and the SVR. The sensitivity analysis is carried out by the range analysis method. Finally, the hierarchical safety thresholds for the subgrade void are proposed. The results show that the subgrade void has the most significant influence on the carbody vertical acceleration, the rail vertical displacement, the vertical displacement and the slab tensile stress. From the range analysis, the subgrade void area has the largest effect on the dynamic response of the wheel-rail system, followed by the fastener stiffness and the subgrade compaction index K30. The recommended safety thresholds for the subgrade void of level I, II and III are 4.01m2, 6.81m2 and 9.79m2, respectively.
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참고문헌 (23)
참고문헌 신청
Banimahd, M. / 2012 / Behaviour of train–track interaction in stiffness transitions / Proceedings of the Institution of Civil EngineersTransport 165(3):205~214
Chang, C. C. / 2011 / LIBSVM : a library for support vector machines / ACM Transactions on Intelligent Systems and Technology 2(3):1~27
Feng, Q. S. / 2019 / Lifetime performance assessment of railway ballastless track systems affected by a mortar interface defect / J. Aerosp. Eng 32(4):04019037
Guo, Y. / 2018 / Long-term prediction of track geometry degradation in high-speed vehicle–ballastless track system due to differential subgrade settlement / Soil Dynam. Earthq. Eng 113:1~11
Lei, X. Y. / 2014 / Dynamic analysis of the train and slab track coupling system with finite elements in a moving frame of reference / J. Vib. Control 20(9):1301~1317
Chang, C. C. / 2011 / LIBSVM : a library for support vector machines / ACM Transactions on Intelligent Systems and Technology 2(3):1~27
Feng, Q. S. / 2019 / Lifetime performance assessment of railway ballastless track systems affected by a mortar interface defect / J. Aerosp. Eng 32(4):04019037
Guo, Y. / 2018 / Long-term prediction of track geometry degradation in high-speed vehicle–ballastless track system due to differential subgrade settlement / Soil Dynam. Earthq. Eng 113:1~11
Lei, X. Y. / 2014 / Dynamic analysis of the train and slab track coupling system with finite elements in a moving frame of reference / J. Vib. Control 20(9):1301~1317
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