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运用ABAQUS有限元软件建立有砟轨道—路基系统三维动态有限元模型,分析高速和重载列车荷载作用下的路基空间动应力、路基面横纵向动变形和剪应变特性。基于现场条件,选择砟脚内30cm和砟脚处作为路肩横向和纵向的动变形分析参考点,研究动变形引起的路肩倾斜角度随列车速度、道砟厚度、表层厚度和表层模量变化的规律。结果表明,路肩横向和纵向倾斜角随车速增大而增大,随道砟厚度、基床表层厚度和表层模量的增大而减小,基床表层和底层的最大剪应变较为接近,最大剪应变与路肩最大倾角大致呈线性关系。
Using ABAQUS finite element software, a three-dimensional dynamic finite element model of ballastless track-subgrade system is established to analyze the dynamic stress in subgrade and the lateral and longitudinal dynamic deformation and shear strain under high-speed and heavy-haul train loads. Based on the site conditions, the 30cm and 砟 feet in the 砟 foot were chosen as the reference points for the dynamic and deformation analysis of the shoulder of the road in both horizontal and vertical directions to study the law of the angle of inclination of the shoulder caused by dynamic deformation with the variation of train speed, thickness, surface thickness and surface modulus . The results show that the lateral and longitudinal inclination angles of road shoulders increase with the increase of vehicle speed and decrease with the increase of road thickness, bed thickness and surface modulus, and the maximum shear strains near the surface and bottom of bedrock are close to the maximum Shear strain is roughly linear with the maximum inclination angle of the shoulder.