蒙内铁路长大下坡道制动试验及计算分析

蒙内铁路作为连接东非第一大港蒙巴萨和肯尼亚首都内罗毕的一条客货并行一级线路,对肯尼亚国内以及东非地区的经济发展和政治稳定具有重要的意义,也对于我国"一带一路"战略的实施以巩固中-肯关系和中非关系有着至关重要的意义.由于较为特殊的地理原因使得蒙内铁路全线长大坡道占比超过50％,使得长大坡道上的行车安全成为蒙内铁路安全运营...

Brake Field Test and Calculation Analysis of Long Down Grade Line in Mombasa-Nairobi Railway

Mombasa-Nairobi railway is the first-class mixed passenger and freight railway that connects the biggest port of east Africa and the capital of Kenya.It plays a significant role to economic development and political stability of Kenya and east Africa,and is very meaningful to the Silk Road Economic Belt and 21st Century Maritime Silk Road Initiative(the Belt and Road Initiative),relationship of China-Kenya and China-East Africa.Due to the special geographical condition,the ratio of long down grade line in entire railway is more than 50%,that means the operation safety in long down grade line is the key of the Mombasa-Nairobi railway.In this paper,the long down grade line with grade of 11.7‰is set to the analysis focus,the brake field test is carried out by the DF11 locomotive and 17 vehicles train with speed of 118km/h,the brake distance is 890m,the inflation time before emergency brake is enough and it takes 3s to decrease the pipe pressure to 0 which conforms with the regulations.Based on the result of the field test,the reliability and accuracy of theoretical calculation and software calculation is verified.The calculation results indicated that in order to finish the emergency brake with 17-vehicles train on 12‰ long down grade line within brake distance of 800m,the brake speed should not exceed 112km/h,and on the 6‰ long down grade line,the brake speed should not exceed 118km/h.The calculation and analysis in this paper can provide effective and reliable test and theoretical support to the operation safety of the Mombasa-Nairobi railway and establishing of safety control system.