高速铁路隧道列车风作用下接触网安全性分析

施成华，杨伟超，彭立敏，王照伟，雷明锋

(中南大学 土木工程学院，湖南 长沙，410075)

摘 要：采用数值模拟方法，对高速列车在隧道内运行过程中所产生的列车风速度的变化过程进行分析，计算隧道内不同位置在列车运行过程中的最大风速和最大风压，进一步研究隧道内预留滑道槽型和螺栓锚固型接触网在列车反复冲击压力作用下的安全性。研究结果表明：隧道内不同断面的接触网设施只在列车车身运行至该断面的一段时间内才承受负向列车风(与列车运行方向相反)；离列车表面越近的位置，列车风的速度越大；对于螺栓锚固型接触网悬挂件，在单线隧道350 km/h 行车条件下，隧道衬砌混凝土中的最大拉应力已接近混凝土的疲劳抗拉强度，应采取适当的加强措施；对于滑道槽式接触网悬挂件，在列车风的反复作用下是安全的。

关键词：隧道；列车风；接触网；安全性

Analysis of catenary’s safety under train wind action in high-speed railway tunnel

SHI Cheng-hua, YANG Wei-chao, PENG Li-min, WANG Zhao-wei, LEI Ming-feng

(School of Civil Engineering, Central South University, Changsha 410075, China)

Abstract:By using the numerical simulation method, the change process of wind speed when high-speed train running in tunnel was studied, the maximum wind speed and wind pressure at different positions in tunnel were calculated, and then the safety of slide-type and anchor-type catenary in tunnel under the repeated impact pressure caused by train running was studied. The calculated results show that at different cross-sections in tunnel, the negative train wind (opposite to train running direction) only occurs in a certain period when the whole train is through this section. The nearer the position is to the train surface, the greater the speed of the train wind. For the anchor-type catenary, the greatest tensile stress in the tunnel lining is close to the fatigue tensile strength of concrete at 350 km/h driving speed in single-track tunnel, and appropriate measures should be taken to strengthen it. For the slide-type catenary, it is safe under repeated action caused by train wind.

Key words:tunnel; train wind; catenary; safety