Study on the critical diameter of the subway tunnel based on the pressure variation  

作　　者：SUN ZhenXu YANG GuoWei ZHU Lan 

机构地区：[1]Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences [2]Beijing Rail and Transit Design & Research Institute CO.LTD

出　　处：《Science China(Technological Sciences)》2014年第10期2037-2043,共7页中国科学（技术科学英文版）

基　　金：supported by the National Basic Research Program of China("973"Project)(Grant No.2011CB711100);the National Natural Science Foundation of China(Grant No.11302233)

摘　　要：When the subway train operates at a speed higher than 100 km/h,the corresponding aerodynamic issue becomes severe.To meet the future requirement for the speedup of subway trains,a research on the critical diameters of the subway tunnel for trains operating at 120 and 140 km/h has been performed based on passengers’aural discomfort caused by rail tunnel pressure variation.A three-dimensional computational fluid dynamic approach has been adopted for analysis.Meanwhile,trains with different airtight indices are considered and the pressure variations inside and outside the trains are both under investigation.Based on the corresponding criteria for different airtight indices,critical tunnel diameters for trains running at different speeds have been determined.This study would aid in the tunnel section design for future high-speed subway trains.

关 键 词：tunnel pressure waves airtight index aural discomfort blockage ratio 

分 类 号：U451[建筑科学—桥梁与隧道工程]