지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.5
- 수록면
- 331 - 341 (11page)
- DOI
- 10.7782/JKSR.2018.21.4.331
이용수
초록· 키워드
오류제보하기
Dynamic scattered variation of the coefficient of adhesion (CoA) with the slip rate is defined in this study as the dynamic variance. A two-dimensional (2D) dynamic CoA model was used to verify whether the 2D dynamic CoA model can accurately estimate the experimentally measured CoA and capture the dynamic variance. Qualitative analysis was performed to determine the parameters primarily causing the dynamic variance. To do this, the CoAs at the wheel-rail contact under dry conditions were tested using a twin-disc rig at 1,000, 1,500, and 2,000 rpm. The wheeldriving torque, normal contact force, and rotational speeds of wheel and rail discs were measured. The empirical coefficients in the 2D dynamic CoA model were found using MATLAB optimization toolbox for each rotation speed. The experimentally measured CoAs were estimated using the 2D dynamic CoA model with the determined empirical coefficients at each rotation speed. The results showed that the 2D dynamic CoA model can estimate the measured CoAs at all rotation speeds with good accuracy (within 7% of the percent-root-mean-square-error) and successfully capture the dynamic variance. The qualitative analysis showed that no parameters primarily influence the dynamic variance.
목차
Abstract
1. Introduction
2. Methods
3. Results and Discussion
4. Conclusions
References
참고문헌 (31)
참고문헌 신청
H. Harrison, T. McCanney, J. Cotter (2002) Recent developments in coefficient of friction measurements at the rail/wheel interface, Wear, 253, pp. 114-123.
P. Voltr, M. Lata (2015) Transient wheel-rail adhesion characteristics under the cleaning effect of sliding, Vehicle System Dynamics, 53, pp. 605-618.
H. Chen, M. Ishida, A. Namura, K. Baek, et al. (2011) Estimation of wheel/rail adhesion coefficient under wet condition with measured boundary friction coefficient and real contact area, Wear, 271, pp. 32-9.
D.I. Fletcher, S. Lewis (2013) Creep curve measurement to support wear and adhesion modelling, using a continuously variable creep twin disc machine, Wear, 298-299, pp. 57-65.
O. Polach (1992) SBB 460 Adhasionsversuche, Techn Report No. 414, SLM Winterthur.
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UCI(KEPA) : I410-ECN-0101-2018-557-002244507