高速铁路散体道床力学行为、劣化机理及变形规律研究

项目名称： 高速铁路散体道床力学行为、劣化机理及变形规律研究

项目编号： No.U1234209

项目类型： 联合基金项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 翟婉明

作者单位： 西南交通大学

项目金额： 280万元

中文摘要： 针对现代高速铁路有砟轨道结构特征，围绕高速铁路散体道床力学行为、状态劣化与累积变形这一核心问题，采用理论分析、数值模拟与试验研究相结合的方法，把可以反映散体道床细观力学行为的高性能离散元分析模块引入到车辆－轨道耦合动力学模型中，建立基于多体动力学－离散元－有限元的车辆－基础结构耦合分析理论及技术，建立高速铁路散体道床力学性能与变形分析新理论和新方法，揭示高速列车荷载作用下散体道床的力学行为和状态劣化机理，探明高速铁路散体道床状态演变和变形规律、以及道床动力特性和变形对车辆－轨道耦合振动的影响，提出高速铁路散体道床性能与状态演变的预测方法，给出有砟轨道状态控制建议准则，为不同速度等级的高速铁路有砟轨道维修养护与安全管理提供科学依据和理论支撑。预期成果对我国高速铁路有砟轨道技术发展具有重要理论意义和良好应用前景。

中文关键词： 高速铁路；散体道床；力学行为；劣化机理；累积变形

英文摘要： This project deals with the problem of mechanical behavior, deterioration mechanism and deformation of the high-speed railway granular ballast bed. By using the method of combining the theoretical analysis, numerical simulation with experiments, high-performance discrete element analysis module for the micromechanical behavior of the ballast bed is induced to the theory of vehicle-track coupled dynamics. The new theory and the new method of dynamic analysis for the ballast bed will be established based on the coupling of multi-body dynamics method, discrete element method and finite element method. The mechanical behavior and state deterioration mechanism of the ballast bed under the action of the high-speed train will be analyzed. The state evolution and deformation law of the high-speed railway ballast bed will be investigated. The prediction method and control standards of high-speed railway ballasted track state evolution will be studied so as to provide scientific basis and theoretical foundation for the maintenance and safety management of high-speed railway ballasted track with different operation speeds. The achievements of the project will provide some theoretical foundation for determining the design standards and the maintenance criterions of modern high-speed railway ballasted track.

英文关键词： high-speed railway；granular ballast；mechanical behavior；deterioration mechanism；accumulative deformation