高速铁路隧道内列车横向摆动的气动力学行为及控制方法

项目名称： 高速铁路隧道内列车横向摆动的气动力学行为及控制方法

项目编号： No.51478474

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 建筑科学

项目作者： 杨伟超

作者单位： 中南大学

项目金额： 80万元

中文摘要： 由于双线隧道的线路中线与隧道中线并不完全重合，列车高速驶入隧道时会在车体两侧形成显著的气动压差，造成车体的横向摆动问题，进而会影响列车的乘坐舒适性和行车安全。国内外对此问题的研究尚处在起步阶段，本项目采用理论分析和室内试验等方法,结合现场测试结果，研究列车高速驶入隧道时车体周边流场的微观结构特征，揭示作用于车体结构气动荷载的形成机制，确定气动荷载时程曲线及荷载谱，分析隧道内气动荷载作用下车体结构的振动特性，研究气动荷载下隧道内列车横向摆动的力学机制及气动力学行为特征；通过参数敏感性分析，确定影响列车横向摆动的主要因素及规律，针对我国高速铁路的特点，分别提出既有线路的改造措施及列车安全运行控制指标、新建线路隧道等基础设施的结构和设计参数，建立基于降低车体横向摆动效应的高速铁路隧道结构设计方法和设计体系。研究成果对我国高速铁路列车的运行安全、既线路改造和新建线路设计具有重要的理论指导意义。

中文关键词： 隧道工程；高速列车；动力响应；气动；横向摆动

英文摘要： Since the rail center and the centerlines of tunnel is not coincide entirely, the aerodynamic pressure difference between the both sides of the vehicle body is so significant that the high-speed train would be suffered a serious lateral oscillation during entering a double lines tunnel in a very high-speed, which would reduce the ride comfort and the traffic safety. The research on this issue，regardless domestic and international, is still in its infancy currently. Based on theoretical analysis and series of experiments, this reseach focuses on suce issues as the aerodynamic load acting on train, the safety of running train and the control technologies of slowing lateral swing of High-speed train. Firstly, the microscopic structure and the foundation mechanism of airflow field around train is discussed when train is travelling in double lines tunnel with a very high speed, the change progress over time and its spectral characteristics of aerodynamic load act on train is to get. Then the vibration characteristics of train body are analyzaed when the train is acted by the aerodynamic load. The lateral swing mechanism and related vibration behaviors characteristics of train will be revealed The key influence factors enhancing the lateral swing of trian is going to be determined accroding series of parameter sensitivity, as the same time, the safety indicators of train's lateral swing will be given with different parameter values. Finally, either the measurements of lowing train's lateral swing about the tunnel or the speed limiting restrictions of running train are provided to those high-speed rail in operation, at the same time, the design calculation method related to the lowing lateral swing of train will be given according to those new high-speed rail tunnel construction. It would be significant of this research results to the safety involving high-speed train in operation, reconstruction of existing high-speed rail and the design of those new high-speed rail in the future.

英文关键词： tunnel engineering;high-speed train;dynamic response;aerodynamics;lateral swing