铁道科学与工程学报2024，Vol.21Issue(2)：433-443,11.DOI:10.19713/j.cnki.43-1423/u.T20230480
400 km/h高铁隧道出入口缓冲结构开口率对微压波影响研究
Study on the effect of buffer structure opening rate on micro-pressure wave at the exit and entrance of 400 km/h high-speed railway tunnel
摘要
Abstract
As the speed of high-speed trains increases,the issue of increased train-tunnel aerodynamic effects and micro-pressure waves exceeding the limits becomes increasingly serious.Previous studies have shown that the installation of buffer structures at tunnel openings is one of the effective means of solving the problem of micro-pressure waves.However,as tunnel lengths increase and train speeds rise,a design approach that solely relies on the entrance buffer structure becomes limited.In addition,both domestic and international research has focused more on entrance buffer structures and less on the design of exit buffer structures and buffer structures at both entrances and exits of tunnels.To address this issue,the key influencing parameters of the open exit buffer structure were analyzed using the controlled volume method.A three-dimensional numerical simulation model based on the LES turbulence model and dynamic grid technology was developed to verify the correctness of key parameters.The effect of symmetrical and asymmetrical buffer structures at tunnel entrances and exits on the characteristics of micro-pressure waves was also analyzed,and a design method for open-ended buffer structures suitable for single and double-line tunnels was proposed.The results show that:1)The opening ratio of the tunnel exit buffer structure is a key parameter affecting the efficiency of the exit buffer structure in relieving microwave pressure,the larger the opening ratio,the lower the maximum microwave pressure;2)The optimal buffer structure at the entrance of the tunnel is controlled by the pressure gradient,and the opening rate of the buffer structure at the exit of the tunnel is increased,resulting in a higher relief rate for micro-pressure waves in a single-line tunnel buffer structure design;3)The design of open-ended buffer structures in double-line tunnel should increase the total opening ratio and choose small,multiple openings with symmetrical entrances and exits.关键词
400 km/h高速铁路隧道/出口缓冲结构/微压波/控制容积法/出入口缓冲结构设计Key words
400 km/h high-speed railway tunnel/exit buffer structure/micro-pressure wave/controlled volume method/buffer structure design of exit and entrance分类
交通工程引用本文复制引用
孙浩程,王英学,古理全,张子为,马伟斌..400 km/h高铁隧道出入口缓冲结构开口率对微压波影响研究[J].铁道科学与工程学报,2024,21(2):433-443,11.基金项目
国家自然科学基金资助项目(51778539) （51778539）
中国国家铁路集团有限公司科技研究开发计划(P2021G053) （P2021G053）
