高速列车制动计算中值得关注的问题

Noticeable Problems of Braking Calculation for High Speed Train

1998年颁布实施的《列车牵引计算规程》已法定采用单位重力的作用力N/kN作为单位力(列车阻力或牵引力或制动力)的单位,我国高速列车制动计算中单位力的单位必须统一到法定单位上来,并采用由此建立的一系列计算公式;同时指出高速动车组的制动计算绝不能忽视回转质量系数,均牵式(动力分散式)高速列车的回转质量系数大于推挽式(动力集中式);此外,还对制动粘着系数、列车基本阻力等制动计算参数的试验公式实用化问题作了论述。

The effort per gravity N·kN^- 1 is legally determined to the unit of specific effort （ train resistance or tractive effort or braking effort） on 《Regulations on Railway Train Traction Calculation》 in the year 1998, so the unit of specific effort must be unitized on the legal unit for braking calculation of high speed train in China, then the established series calculative formulas should be used to any form.The paper points out that the rotary mass coefficient should not be neglected for braking calculation of high speed motor train units （ emu or dmu） and the rotary mass coefficient of evenly traction mode （distributed power） is higher than pull- push mode （concentrated power） . In addition, the practical formulas of braking adhesion coefficient （wet rail and dry rail） on Chinese railway are put forward.