大风下高速列车进出防风明洞及隧道口的气动特性数值模拟研究

发布时间：2018-03-31 14:35

本文选题：高速列车　切入点：防风明洞　出处：《兰州交通大学》2015年硕士论文

【摘要】：兰新第二双线“百里风区”建立了世界上第一座防风明洞。防风明洞与隧道结构类似,但作为地面上的防风建筑,在其一侧设有开孔。国内外对列车进出隧道空气动力学问题研究已有较多成果,但对大风下高速列车进出防风明洞的空气动力学问题还未有研究。兰新第二双线线路的运营车采用我国长春轨道客车股份有限公司研制的CRH5型动车组。本文以CRH5型动车组及我国四方机车车辆股份有限公司提供的CRH2型动车组为研究对象,采用数值模拟方法,对高速列车进出防风明洞及隧道口的空气动力效应进行研究。首先,为验证数值方法计算的正确性,采用国内现车试验的交会压力波数据进行验证,根据试验的介绍,建立CRH2型车会车模型,进行数值计算并与试验数据进行对比,得出合理的数值计算方法。其次,对于大风下列车的运行,分析了防风明洞的绕流特性,对列车驶过与未驶过挡风墙的绕流流场特性进行分析,同时也分析了防风明洞洞口交会的压力场和速度场,给出了单车进出明洞及隧道口过程中车体压力波动的变化规律。再次,对CRH5型车及CRH2型车进出防风明洞、隧道及洞口交会的气动力及力矩进行对比分析,从数值模拟的计算结果简单分析了两种车型同种运行环境下的气动特性。对同种车型不同运行工况的结果也进行了对比,得出了运行较稳定的工况。最后,对列车的运行存在影响的因素——车速、风速及风向角进行了较系统的研究,分析了车速、风速变化对列车侧向力、升力及倾覆力矩的影响规律。本文对高速列车进出防风明洞及隧道口的气动特性进行数值分析,本文的研究方法及结论可以为进一步的系统化研究提供参考,同时也可为列车的运行提供参考。
[Abstract]:Lanzhou second double "Barry wind zone" established the world's first wind Myeongdong. Similar wind Myeongdong and tunnel structure, but as a windbreak building on the ground, on its side is provided with an opening at home and abroad. On the train passing through tunnel aerodynamics research have more achievements, but the study of aerodynamic problems of high-speed trains under strong wind there is no import wind Myeongdong. Lanzhou second double line operation vehicle using CRH5 type EMU developed Changchun rail passenger Limited by Share Ltd in China. Based on the CRH5 CRH2 EMU EMU and China Sifang locomotive Limited by Share Ltd as the research object, using numerical simulation method to study the aerodynamic effect of high speed train the import and export of the wind tunnel tunnel. Firstly, in order to verify the correctness of the calculation of numerical method, air pressure test using domestic car number According to the verification, according to the introduction, the establishment of CRH2 type car car model, calculated and compared with experimental data, the calculation method of reasonable value. Secondly, for the wind under the train, analyzes the flow characteristics of the wind flow around the tunnel, the train passing and not passing the characteristics of analysis, but also analyzes the wind Myeongdong intersection hole pressure field and velocity field and variation of given body pressure fluctuation and the tunnel import bicycle Myeongdong process. Once again, CRH5 type and CRH2 type of car car import wind Myeongdong, aerodynamic force and moment of tunnel and the intersection were analyzed from numerical calculation the simulation results of a simple analysis of the two models of the same operating environment. The aerodynamic characteristics of the same models under different operating conditions results were compared, the stable operation condition. After the running of train influence factors -- speed, wind speed and wind direction were studied systematically, analyzed the change of wind speed of the train speed, lateral force, lift force and overturning moment. The influence of dynamic characteristics of the high-speed train passing through tunnel and wind tunnel gas numerical analysis, research methods and the conclusion of this paper can provide a reference for further systematic research, but also can provide a reference for the operation of the train.

【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U451.3;U453.1

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