Analysis of Wind Field Characteristics of Catenary in Transition Section of Different Windproof Facilities
Research purposes:After passing through different wind protection facilities,strong winds form a vortex zone in the transition section.A high-wind acceleration zone is created near the catenary and the supporting cable,increasing wind deflection and vibration on the catenary.This has a greater impact on the safety,stability,and fatigue resistance of the catenary.To study the wind field characteristics at the catenary in the transition section of different wind protection facilities,based on the typical structures of wind protection transition sections in Mingdong and embankment wind barriers of the Lanzhou-Xinjiang high-speed railway,numerical calculations and wind tunnel tests were conducted.The study focused on the wind field characteristics at the catenary during the operation of trains in different wind protection facilities such as tunnels,Mingdong,windshields,and wind barriers.Research conclusions:(1)The variation of wind speed is generally consistent for different line structures.After the incoming wind speed undergoes the aerodynamic effect of the train body,the wind speed first increases sharply.As the train gradually moves away from the monitoring point,the wind speed decreases and eventually stabilizes.(2)The wind speed at the supporting cable in the transition section of the wind protection facility is greater than that at the catenary.(3)The wind speed peaks at the transition section of the wind protection facility,such as the tunnel entrance and the transition section between the tunnel and the embankment wind barrier,are relatively high.Attention should be paid during operation,and measures such as elastic locators are recommended to improve the operation status of the pantograph and OCS.(4)The research results can provide a basis for the design of catenary in the transition section of windproof facilities.
windproof transition sectionwind field characteristicswind tunnel testOCSwind-induced response
NETL
NSTL
万方数据
