[1]王维洲,钟登朝,胖涛,等.400 km/h高速铁路隧道洞口等截面无开孔扩大型缓冲结构气动效应分析[J].高速铁路技术,2021,12(05):57-61.[doi:10.12098/j.issn.1674-8247.2021.05.011]
　WANG Weizhou,ZHONG Dengchao,PANG Tao,et al.Aerodynamic Effect Analysis of Enlarged Buffer Structure without Opening at Uniform Cross-section of Tunnel Portals of 400 km/h High-speed Railway[J].HIGH SPEED RAILWAY TECHNOLOGY,2021,12(05):57-61.[doi:10.12098/j.issn.1674-8247.2021.05.011]
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400 km/h高速铁路隧道洞口等截面无开孔扩大型缓冲结构气动效应分析()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
12卷
期数:
2021年05期
页码:
57-61
栏目:
出版日期:
2021-10-28

文章信息/Info

Title:
Aerodynamic Effect Analysis of Enlarged Buffer Structure without Opening at Uniform Cross-section of Tunnel Portals of 400 km/h High-speed Railway
文章编号:
1674—8247(2021)05—0057-05
作者:
王维洲;  钟登朝;  胖涛;  梅元贵
1. 兰州交通大学甘肃省轨道交通力学应用工程实验室, 兰州 730070;
2. 中铁二院工程集团有限责任公司, 成都 610031
Author(s):
WANG Weizhou;  ZHONG Dengchao;  PANG Tao;  MEI Yuangui
1. Gansu Laboratory for Mechanics Applied Engineering of Railway Transportation, Lanzhou Jiaotong University, Lanzhou 730070, China;
2. China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China
关键词:
400 km/h高速铁路|隧道|等截面|缓冲结构|初始压缩波|三维可压缩湍流模型|重叠网格法
Keywords:
400 km/h high-speed railway|tunnel|enlarged buffer structure without opening at the uniform cross-section|initial compression wave|three-dimensional compressible turbulence model|overlapping grid method
分类号:
U451+.3
DOI:
10.12098/j.issn.1674-8247.2021.05.011
文献标志码:
A
摘要:
高速列车驶入隧道产生初始压缩波，压缩波以音速传播至隧道出口处向外辐射形成压力脉冲波，影响居民的心理健康，带来了严重的环境问题。隧道微气压波与隧道出口端内压缩波梯度成正比，而列车头部驶入隧道的初始压缩波最大梯度与列车速度的3次方近似成正比，因此，在隧道洞口设置缓冲结构可大幅度降低初始压缩波的最大梯度值，是控制和消除微气压波危害的主要措施之一。本文采用三维可压缩非定常流动的N-S方程和SST-kω湍流模型，基于有限体积法和重叠网格法，在研究未设缓冲结构初始压缩波基本特征的基础上，研究400 km/h条件下等截面无开孔扩大型缓冲结构对初始压缩波波形和压力梯度的影响规律，并比较不同缓冲结构断面面积与隧道断面面积比值对压缩波波形和降低压力梯度的影响规律，以期为400 km/h隧道缓冲结构的设计提供基础。
Abstract:
A high-speed train entering a tunnel will generate an initial compression wave, which propagates at the speed of sound to the tunnel exit and radiates outward to form a pressure pulse wave, imposing an impact on the mental health of residents in the vicinity and cauing serious environmental problems. The micro-pressure wave in tunnel is directly proportional to the compression wave gradient at the exit, while the maximum gradient of the initial compression wave when the train head enters the tunnel is approximately directly proportional to the third power of the train speed. Therefore, setting a buffer structure at the tunnel portals can greatly reduce the maximum gradient of the initial compression wave, and is one of the main measures to control and eliminate the hazards of micro-pressure wave. In this paper, the N-S equation of three-dimensional compressible unsteady flow and SST-kω turbulence model are used. Based on the finite volume method and overlapping grid method, the paper firstly looks into the basic characteristics of initial compression wave when no buffer structure is set, and then explores the influence law of enlarged buffer structure without openings at uniform cross-section on initial compression wave waveform and pressure gradient at 400 km/h, and compares the influence law of different ratio of buffer structure cross-section area to tunnel cross-section area on compression wave waveform and pressure gradient reduction, so as to put forward a proposal suitable for 400 km/h.

备注/Memo

备注/Memo:
作者简介:王维洲(1995-),男,硕士研究生。基金项目:中铁二院工程集团有限责任公司科技开发计划（KNSQ202061）引文格式:王维洲, 钟登朝, 胖涛, 等. 400 km/h高速铁路隧道洞口等截面无开孔扩大型缓冲结构气动效应分析[J]. 高速铁路技术,2021,12(5):57-61.WANG Weizhou, ZHONG Dengchao, PANG Tao, et al. Aerodynamic Effect Analysis of Enlarged Buffer Structure without Opening at Uniform Cross-section of Tunnel Portals of 400 km/h High-speed Railway[J]. High Speed Railway Technology, 2021, 12(5):57-61.
更新日期/Last Update: 2021-10-28