Study on the influence factors of HST running in the tunnels at 400 km/h  

作　　者：Lei Liu Gengjie Sun Ziwei Zhang Jiaqiang Han 

机构地区：[1]Railway Science and Technology Research and Development Center,China Academy of Railway Sciences Corporation Limited,Beijing,China [2]Key Laboratory of Urban Underground Engineering of the Ministry of Education,Beijing Jiaotong University,Beijing,China [3]Beijing’s Key Laboratory of Structural Wind Engineering and Urban Wind Environment,Beijing Jiaotong University,Beijing,China [4]School of Engineering,University of Warwick,Coventry,UK

出　　处：《Railway Sciences》2025年第2期213-230,共18页铁道科学(英文)

摘　　要：Purpose–The paper aims to clarify the operation rationality of high speed trains(HSTs)under tunnel condition with the speed of 400 km/h through representative aerodynamic factors including running drag,eardrum comfort,carriages noise,aerodynamic loads on tunnel ancillary facilities and HST,micro-pressure waves,and then put forward engineering suggestions for higher speed tunnel operation based on the analysis.Design/methodology/approach–Based on the field measurement data of CR400AF-C and CR400BF-J tunnel operation,correlations between each aerodynamic indicators with HST speed were established.By analyzing the safety reserve of aerodynamic indicators at 350 km/h and the sensitivity of each indicator to HST speed increasing and the indicators’formation mechanism,the coupling relationship between various indicators was obtained.Findings–The sensitivity of different aerodynamic indicators to speed variation differed.The aerodynamic indicators representing flow field around HST showed a linear relationship with HST speed including noise,eardrum comfort,aerodynamic load on HST body.The positive aerodynamic load on tunnel auxiliary facilities and the micro-pressure wave at the entrance of the tunnel have the same sensitivity to the 3th-power relation of HST speed.The over-limit proportion of micro-pressure wave was the highest among the indicators,and aerodynamic buffering measures were recommended for optimization.The open tunnel pressure relief structure is recommended,while allowing trains to pass through the tunnel at an unconditional speed of 380 km/h.Originality/value–Comprehensive evaluation of multiple aerodynamic indicators for HST tunnel operation with higher speeds was realized.The main engineering requirements to release aerodynamic effect were identified and the optimization scheme is proposed.

关 键 词：400 km/h high-speed railway operating condition Train-tunnel aerodynamic effects Coupling analysis Engineering optimization 

分 类 号：V21[航空宇航科学与技术—航空宇航推进理论与工程]