侧风作用下高速铁路列车-桥梁系统气动耦合作用机理与安全控制方法研究

项目名称： 侧风作用下高速铁路列车-桥梁系统气动耦合作用机理与安全控制方法研究

项目编号： No.U1434205

项目类型： 联合基金项目

立项/批准年度： 2015

项目学科： 建筑科学

项目作者： 李小珍

作者单位： 西南交通大学

项目金额： 270万元

中文摘要： 侧风作用下列车-桥梁系统气动绕流特性与耦合机理是桥上列车行车抗风安全性评价的重要前提。本项目结合理论分析、风洞试验和数值模拟，对侧风作用下列车-桥梁系统气动作用耦合机理和行车安全控制方法进行系统研究。通过改进移动列车-桥梁系统风洞试验装置，对典型列车、典型桥梁系统静动态气动绕流特性进行模型风洞试验和CFD数值模拟；发展风-车-线-桥耦合振动精细化模型，据此，揭示侧风作用下列车-桥梁系统气动作用耦合机理。然后，针对桥塔遮蔽等风场突变效应、以及设置风屏障情况下列车-桥梁气动作用耦合机理进行研究。最后，提出侧风作用下保证桥上高速列车安全运营的列车与桥梁评价指标限值标准，明确桥上高速列车行车抗风准则和安全控制方法。项目还尝试基于动力可靠度理论对高铁桥上列车行车抗风安全性进行评价。预期研究成果具有重要学术意义和实用价值。

中文关键词： 列车桥梁系统；气动作用；耦合机理；安全控制；侧风作用

英文摘要： The aerodynamic detouring flow characteristics and coupling mechanism of train-bridge system under cross-wind is a prerequisite for the study of running safety of train on high-speed railway. Based on theoretical analysis, wind tunnel experiment and numerical simulation, this project aims to research the above aerodynamic detouring flow characteristics and coupling mechanism. Firstly, three important aspects will be studied to reveal the aerodynamic coupling mechanism of train-bridge system under cross-wind, i.e. refined random wind field model of common and special local locations of hig-speed railway lines, developing wind tunnel test device to carry out model wind tunnel test and CFD numerical simulation of the static and dynamic aerodynamic detouring flow characteristics of some typical train-bridge systems, improving the previously established wind-train-track-bridge coupled dynamic model, respectively. Secondly, aerodynamic coupling mechanism of train-bridge system under some especial situations will be investigated, such as some sudden changed wind fields of bridge tower shielding, windshield erecting, etc. Lastly, some evaluation index to ensure operating safety of high-speed train under cross-wind will be put forward, at the same time, wind resistance standard and safe control method of high-speed train operation will be clarified. In addition, this project will attempt to conduct some preliminary research of the wind resistance evaluation for high-speed train operation on a basis of dynamic reliability theory. Expected results of this project have significant academic values and engineering practice benefits.

英文关键词： NULL