摘要
本文以列车在川藏线雅安至新都桥段长大下坡道上进行连续调速制动为出发点,研究该线路区段的列车闸瓦温升和凉闸问题。研究分析了30‰坡道限速65 km/h和75 km/h两种情况下的调速制动情况,并推导得出最大凉闸距离,研究表明:川藏线雅安至新都桥段按设计方案设站,在最不利条件下也无须增设凉闸站,但需要在已有车站上进行凉闸作业。在此基础上以该线路区段各区间闸瓦温升数据为依据,构建了凉闸站优化设置模型,并求解得出在不同限坡情况下的凉闸作业方案。通过对凉闸作业引起限制区间转移的研究,发现上述凉闸站设置方案均不会对通过能力产生影响。本文研究结论对川藏线的设计具有一定的借鉴意义。
Continuous braking control at large-sloped railways can lead to overheated brake blocks and sometimes it is necessary to have dedicated stations to allow the brake blocks to cool down. The study discusses the necessity of having such cool-down stations along the Ya’an-Xinduqiao section of the Sichuan-Tibet Railway. In particular, we analyze the braking situation for 30‰ gradient with speed limit of 65 km/h or 75 km/h and determine the maximum length of brake cool-down stations. It is found that there is no need to build new cool-down stations along the Ya’an-Xinduqiao section. Nevertheless, we show that it is necessary to conduct the cool-down operation at the existing stations, especially at higher speed limit. A 0-1 integer programming model is further built to optimize the number of cool-down stations while satisfying some operational constraints. The solutions indicate that the setting of brake cool-down stations do not affect the carrying capacity. The findings of the paper shed some light on the design of the Sichuan-Tibet railway.
出处
《交通运输工程与信息学报》
2017年第4期11-17,共7页
Journal of Transportation Engineering and Information
基金
中国中铁二院工程集团有限责任公司科研项目《高寒山区长大坡道对铁路运输能力的影响研究》14126114(14-16)
关键词
铁路运输
通过能力
数学模型
凉闸站
railway transportation
carrying capacity
mathematic model
brake cool-down stations
