MATLAB列车牵引计算系统设计与实现
毕业论文关键词：列车牵引计算；单位合力曲线；运行时分图；MATLAB
Design and realization of train traction calculation system
Abstract：Train traction calculation is the way of scientific calculation in rail transport, which
studyon thetrain operation alone with the rail and other relativeissues which are affectedby
external force. It is based onmechanics, andscientific experiments, analyzingvariousphenomena
and principle in the course oftrain operation and it can realize the automatic algorithm of
traction. The paper based on the theory of train traction calculation, researching traction
calculation of some train on three conditions.This study also summarizes the unit of force of
three running conditions when the train passes a certain route. After that by some way, the
time of operation can be determined. In the end, through the use of MATLAB, the pictures of
unit of force and time of operation can be drawn. In the end, the function of automaticalgorithm
of traction can be realized.
KeyWords：Train traction calculation; the picture of unit of force; the picture oftime of operation; MATLAB
目录
1 绪论 1
1.1研究意义 1
1.2国内外研究现状和水平 1
1.2.1国外研究情况 .1
1.2.2国内研究情况 .2
1.3本课题发展趋势 2
1.4本课题的基本内容 2
1.5课题技术线路 3
2 列车牵引计算基础理论4
2.1机车牵引力 4
2.1.1机车牵引力的形成 .4
2.1.2黏着牵引力 .4
2.1.3牵引力取值 .5
2.2列车运行阻力 5
2.2.1基本阻力 .6
2.3列车制动力 9
2.3.1空气（闸瓦）制动 .10
2.3.2动制动力力 .10
2.4列车运动原理 10
2.4.1单位合力曲线 .10
2.4.2列车运动方程 .11
3 算例分析 14
3.1线路纵断面简化 14
3.2课程设计已知条件 17
3.2.1机型 .17
3.2.2线路条件 .17
3.2.3车辆编组 .17
3.3牵引重量计算 18
3.4牵引质量的验算 19
3.4.1按平直道最高运行速度下的保有加速度计算.19
3.4.2按起动地段的坡度计算.19
3.4.3按到发线有效长检算 .20
3.5 计算列车换算制动率 20
3.6 DF4 内燃机车三种工况合力计算 .21
3.7 列车牵引运行时分计算 .23
3.8 MATLAB 在实际算例中的应用 27
3.8.1 MATLAB 应用内容 27
3.8.2 MATLAB 基本编程语言 27
4 小结 28
致谢 29
参考文献 30
附录 31
1.绘制机车单位合力曲线程序 31
2.绘制机车单位合力曲线程序 31 1 绪论
1.1 研究意义
随着时代发展，动车组的快速、便捷、节能的特性无疑成为主要的现代化交通工具。