台阶开孔式组合型缓冲结构的气动效应分析

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中图分类号： U451+.3 文献标志码：A 文章编号：1005-8249（2025）04-0123-0

DOI：10.19860/j.cnki.issn1005-8249.2025.04.023

YANG Binbin， YAN Yaguang

（School of Civil Engineering，Hebei University of Engineering， Handan O56O38， China）

Abstract：Withthecontinuous increaseinhigh-speedtrainvelocities，thetrain-tunnelaerodynamic efects intensify，and the micro-pressure wave problem becomes increasinglysevere.Single-type buffer structures canno longer meet design requirements.Therefore，acombined bufer structure-a stepped ventcombined bufer structure-is proposed.Based on the three-dimensional，compressble，unsteady Navier-Stokesequations，numerical simulationswereemployedtoinvestigatefour keyparameters：vent distance，ventilationrate，numberofvents，andtrain speed.The waveform characteristicsof the nitial compression wave under varying working conditions wereanalyzed.The results show thatforthe steppedventcombined bufer structure，the optimal mitigation efect on pressure gradient （reaching 57.2% ）is achieved under the following conditions：vent distance 14m ，ventilation rate 24% ，number of vents is single vent，train speed 300km/h

Keywords：high-speedrailway；stepopening buffer structure；pressure gradient；numericalsimulation；micro-pressre wave

0 引言

隧道洞口的微压波随着高速列车速度的提升而变得愈发严重，过大的微压波不仅会严重影响附近居民的生活环境，还会对隧道洞口的建筑物造成损坏[1]。（剩余7628字）