This paper aims at ensuring the safety of catenary operation, by considering the flow field characteristics of the specific railway terrain and the wind-induced dispalcement of the catanery contact wires. Combining fluid and structure analyses, the improved delayed detached eddy simulation (IDDES) method based on the κ-ω turbulence model was used to explore the flow field characteristics at the position of the contact wire area before and after the windbreak wall was increased. The finite element analysis method was used to study the wind-induced displacement, and the relationship between the raising height, the wind speed, and the displacement was comprehensively analyzed. The simulation results were verified by field tests. The results showed that after the rasising height was increased by 1 m, the horizontal wind speeds at the contact wire positions above two railway lines were reduced by 94.26% and 95.60%, respectively. With the decrease in the horizontal wind speed, the value of the wind-induced displacement in lateral direction was significantly reduced as well. Moreover, the response of the wind speed on the midpoint was more sensitive than that at the hanging point.

本文旨在通过考虑特定铁路地形的流场特性和风电接触网的位移来确保接触网的安全性。结合流体和结构分析，基于κ - ω的改进的延迟分离涡模拟（IDDES）方法湍流模型被用来探索防风墙增加之前和之后接触线区域位置的流场特性。采用有限元分析方法研究风致位移，并综合分析了上升高度，风速和位移之间的关系。通过现场测试验证了仿真结果。结果表明，在提高上升高度1 m后，两条铁路线上的接触线位置的水平风速分别降低了94.26％和95.60％。随着水平风速的减小，横向上的风致位移值也显着减小。而且，