华南气候条件的无缝线路改造设计
本设计利用Auto CAD及Excel，对线路大修地段进行了平面、纵断面改善设计，并绘制了的线路大修纵断面改善设计图；通过对轨道结构类型选择、轨道强度及稳定性检算，进而对路基上无缝线路进行设计；通过计算桥上无缝线路钢轨伸缩附加力和挠曲附加力，设计了一座中跨钢桥上的无缝线路，并绘制了无缝线路长轨节布置图。最后对线路大修工作作了专题研究。
毕业论文关键词：线路大修；无缝线路；轨道强度；稳定性
Seamless line reconstruction in Southern climate
Abstract:CWR is one hallmark of the railway modernization, it has some advantages such as smooth running, comfortable and length of service life. With the increasing of driving speed, passenger capacity and cargo carrying capacity, and increasing of axial load, CWR has been a firstly chosen-tract construction of high-speed and heavy-load track, so interregional CWR has been trend of rail track development in China. Line after long-term operation, line profile will change. Therefore, the existing profile have been investigated, under investigation, the line profile is to improve.
This project improves the track’s plan and profile design of track renewal on the railway with the help of Auto CAD and Excel, moreover, it draws the plan of the railway’s profile improved design; by choosing the track’s style; checking the track’s strength and stability, then designs the CWR on the roadbed, by calculating expansion forces and flexibility forces in the rails on the bridge, designing the CWR on a medium span steel bridge, and it draws the plan of long section of track layout of CWR. Finally the work of track renewal done a special study.
Keywords: track renewal;CWR;track strength;stability
目录
1 绪论 1
1.1 线路改造的目的与意义 1
1.2 国内外研究现状与水平 1
2 线路大修平纵横断面设计 3
2.1 线路大修平面设计 3
2.1.1 平面设计概述 3
2.1.2 平面设计公式 4
2.1.3 计算结果 5
2.2 纵断面设计 6
2.2.1 纵断面设计概述 6
2.2.2 旧线数据 6
2.2.3 纵断面设计公式 9
2.2.4 计算结果 10
2.3 横断面设计 14
2.3.1 横断面设计概述 14
2.3.2 横断面设计公式 14
2.4 本章小结 15
3 无缝线路强度设计 16
3.1 概述 16
3.2 基础资料 16
3.3 强度检算 17
3.3.1 按客运SS3计算 17
3.3.2 按货车 内燃机车计算 22
3.4 ANSYS有限元检算 26
3.5 本章小结 27
4 无缝线路结构设计 28
4.1 确定设计锁定温度 28
4.1.1 确定轨温降低幅度 28
4.1.2 确定轨温升高幅度 29
4.1.3 容许的温升幅度 30
4.2 确定锁定轨温 31
4.3 伸缩区长度计算 33
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