摘要
为研究无砟轨道结构在列车荷载作用下的力学性能,将无砟轨道结构简化为无限长双层弹性地基梁;基于弹性基础梁的概念,建立双层弹性地基梁模型及其理论表达公式。当列车位于轨道某一位置上时,在车辆荷载作用下,建立了钢轨与轨道板的微分平衡方程,结合广义“初参数法”及其边界条件,得到双层梁在车辆荷载下的位移和应力的解析值。通过算例,对运行钢轨和轨道板的变形和应力进行了分析,并将计算结果与Ansys分析结果进行了比较,佐证了解析解的可靠性。因此,将板式无砟轨道简化为无限长双层弹性地基梁更加符合实际工况,研究结果可为高速铁路无砟轨道理论研究提供可靠依据,为相关工程提供设计参考。
In order to study the mechanical properties of the ballastless track structure under the load of the train, this paper simplified the ballastless track structure to an infinite double-layer elastic beam. The double-layer elastic beam model and its theoretical expression formula was established using the elastic foundation beam concept. When the train was at a certain position on the rail, the differential balance equation between the rail and the concrete slab was established under the action of the vehicle load. Combined with the generalized “initial parameter method” and its boundary conditions, the analytical solution of the double-layer beam displacement and stress were obtained under the vehicle load. Through calculation examples, the displacement and stress of the rail and concrete slab were analyzed, and the analytical results were compared with the results of ANSYS, which proved the reliability of the analytical solution. Therefore, simplifying the slab ballastless track into infinite double-layer elastic beam is closer to the actual working conditions. The results can provide a reliable basis for the theoretical study of the ballastless track of high-speed railways and design reference for related projects.
作者
何威
李桂峰
HE Wei;LI GuiFeng(College of Civil Engineering and Mechanics,Yanshan University,Qinhuangdao 066004,China)
出处
《机械强度》
CAS
CSCD
北大核心
2022年第4期893-900,共8页
Journal of Mechanical Strength
基金
国家自然科学基金项目(50875230)
河北省自然科学基金项目(E2016203147)资助。
关键词
高速铁路
板式无砟轨道
双层弹性基础梁
ANSYS
力学分析
初参数法
High-speed railway
Slab ballastless track
Two layered elastic beam
ANSYS
Mechanical analysis
Initial parameter method
