中国铁道科学2012，Vol.33Issue(6)：75-82,8.DOI:10.3969/j.issn.1001-4632.2012.06.12
高速铁路接触线气动力特性的风洞试验研究
Wind Tunnel Test on the Aerodynamic Characteristics of Contact Wire for High-Speed Railway
摘要
Abstract
A 2 : 1 scale model of the contact wire applied to China high-speed railway was made to carry out a wind tunnel test. The test was to measure along-wind drag force, crosswind lift force and vertical torsion moment at different wind velocities and in different turbulent flow fields. The change laws of the model's drag coefficient, lift coefficient and torque coefficient under different wind attack angles were analyzed. The influences of the model's section groove on its aerodynamic characteristics were studied. Den Hartog vertical vibration theory was used to analyze the galloping stability of the model. The results show that the aerodynamic drag force of the model increases obviously near -45° and 45° wind attack angles, because the wind direction is nearly perpendicular to the hypotenuse of the model's section groove. The aerodynamic stability of contact wire drops with the increase of turbulence flow field, and it shows a nonlinear relationship. Under no icing condition, the torsion moment of the model is very small, which suggests that the galloping of contact wire is caused by the change of crosswind lift force. The critical wind speed of contact wire galloping is proportional to its natural vibration circular frequency and mechanical damping.关键词
接触线/舞动/气动力特性/风洞试验/高速铁路Key words
Contact wire/ Galloping/ Aerodynamic characteristic/ Wind tunnel test/ High-speed railway分类
交通工程引用本文复制引用
谢强,王巍,李海若..高速铁路接触线气动力特性的风洞试验研究[J].中国铁道科学,2012,33(6):75-82,8.基金项目
铁道部科技研究开发计划项目(J2011J006) （J2011J006）
中央高校基础研究资助项目(2011TJ11021) （2011TJ11021）
