naa a22 4500 510823610 CHVBK 20180411083545.0 cr unu---uuuuu 180411e20130401xx s 000 0 eng 10.1007/s12541-013-0083-1 doi (NATIONALLICENCE)springer-10.1007/s12541-013-0083-1 Optimization of rail profile to reduce wear on curved track [Elektronische Daten] [Ha-Young Choi, Dong-Hyong Lee, Chang Song, Jongsoo Lee] Wear is one of the most important factors affecting the structural life of railways. In urban railways, the curved track results in more wear than tangent track. Furthermore, the wear is frequently detected in a sharply curved track. Wear leads to reduction in the durability of railway as well as increase in the risk of derailment. In a recent study, a rail grinding was suggested to enhance the dynamic performance and extend the fatigue life of rails. This paper deals with an optimum design procedure for asymmetric rail head profile wherein the design profiles of high and low rails are simultaneously determined by minimizing the wear on curved tracks. The procedure employs a genetic-algorithm-based optimization method. The dynamic performances of a train such as lateral force, derailment and vertical force are evaluated using a rail vehicle dynamics program. The optimum design is validated by comparing the initial rail profile with the optimum profile in a full-scale wear test. Korean Society for Precision Engineering and Springer-Verlag Berlin Heidelberg, 2013 Asymmetric Rail Head Profile nationallicence Optimum Design nationallicence Genetic Algorithm nationallicence F x : longitudinal creep force nationallicence γ x : longitudinal creepage nationallicence F y : lateral creep force nationallicence γ y : lateral creepage nationallicence F φ : spin creep force nationallicence γ φ : spin creepage nationallicence Q : vertical force on wheel nationallicence Y : lateral force on wheel nationallicence µ : friction coefficient nationallicence α : angle between wheel flange and horizontal line nationallicence P 0 : axle load nationallicence Q 0 : static load nationallicence Choi Ha-Young Department of Mechanical Engineering, Dongyang Mirae University, 445, Gyeongin-ro, Guro-gu, 152-714, Seoul, South Korea aut Lee Dong-Hyong High-speed Railroad Systems Research Center, Korea Railroad Research Institute, 176, Woulam-dong, Uiwang-si, 437-757, Gyeonggi-do, South Korea aut Song Chang Department of Ocean Engineering, Mokpo National University, 1666, Youngsan-ro, Cheonggye-myeon, Muan-gun, 534-729, Jeonnam, South Korea aut Lee Jongsoo Department of Mechanical Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, 120-749, Seoul, South Korea aut International Journal of Precision Engineering and Manufacturing Korean Society for Precision Engineering 14/4(2013-04-01), 619-625 2234-7593 14:4<619 2013 14 12541 https://doi.org/10.1007/s12541-013-0083-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12541-013-0083-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Choi Ha-Young Department of Mechanical Engineering, Dongyang Mirae University, 445, Gyeongin-ro, Guro-gu, 152-714, Seoul, South Korea aut NATIONALLICENCE 700 1- Lee Dong-Hyong High-speed Railroad Systems Research Center, Korea Railroad Research Institute, 176, Woulam-dong, Uiwang-si, 437-757, Gyeonggi-do, South Korea aut NATIONALLICENCE 700 1- Song Chang Department of Ocean Engineering, Mokpo National University, 1666, Youngsan-ro, Cheonggye-myeon, Muan-gun, 534-729, Jeonnam, South Korea aut NATIONALLICENCE 700 1- Lee Jongsoo Department of Mechanical Engineering, Yonsei University, 50, Yonsei-ro, Seodaemun-gu, 120-749, Seoul, South Korea aut NATIONALLICENCE 773 0- International Journal of Precision Engineering and Manufacturing Korean Society for Precision Engineering 14/4(2013-04-01), 619-625 2234-7593 14:4<619 2013 14 12541 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer