隧道工程课程论文(重庆大学).doc

研究生课程考核试卷
(适用于课程论文、提交报告)
科目: 隧道工程教师:
姓名: 学号:
专业: 类别: 学术
上课时间: 2013年 10月至 2013年 12月
考生成绩:
卷面成绩
平时成绩
课程综合成绩
阅卷评语:

阅卷教师(签名)
重庆大学研究生院制
重庆大学研究生《隧道工程学》课程考核要求
注:1、本试卷格式用于考核方式为“提交报告”、“课程论文”、“考查”等各类别研究生课程的考核。
2、要有明确的课程考核要求:如课程论文(报告)题目(范围)、篇幅(字数)、必须的参考资料、提交时间等。并提前将课程考核试卷发给学生。
3、提交课程论文撰写格式参考《重庆大学博士、硕士学位论文撰写格式标准》。
1、根据隧道工程学讲授内容,结合自己的研究方向,翻译一篇外文期刊论文(外国作者),并对论文进行总结、评述(包括研究内容、研究方法、研究过程、优点及不足之处等)。
2、根据隧道工程学讲授内容,选择5个及以上的工程案例进行分析评述(包括工程概况、工程特点、围岩级别、支护设计、支护参数的可靠性、不足之处等)。
具体要求:
1)页数大于10页。
2)研究报告或论文双面打印
3)该试题附在正文前面。
Influence of tunnel length on the pressure wave generated by high-speed trains passing each other
The prediction of the pressure wave amplitude produced when two trains pass each other in the tunnel is important to the train design for airtightness and tunnel conditions.
In this paper, the key factors of this problem were firstly studied based on theoretical analysis. The equation of the worst tunnel length for the global maximum and minimum pressure values was derived. Then, the influence of tunnel length on lobal minimum pressure and the critical region in which the global minimum pressure varies rapidly were investigated. Finally, a numerical method based on two-dimensional Navier-Stokes equations was established. Typical conditions of two trains passing-by in tunnels of different lengths were simulated. The theoretical putational results agree with each other closely.
passing in tunnel, air pressure wave, tunnel length, numerical simulation
1. Introduction
High-speed trains run as fast as a cruising light aircraft or a taking-off jet plane. The corresponding aerodynamic problems can never be neglected [1, 2]. Special aerodynamic problems may happen when trains passing each other. In these cases, the aerodynamic performance of high-speed trains differs substantially from that of a single train in the open area. Particularly when the trains pass each other in the tunnel, pressure waves arise when the head and the rear of the train are e