大风区段列车耦合风场对接触网正馈线风振及寿命的影响
Influence of train coupled wind field on wind vibration and service life of positive feeder of catenary in strong wind section
摘要
Abstract
To investigate the characteristics of train coupled wind fields of strong wind section and their impact on wind-induced vibration and service life of the positive feeder,a joint three-dimensional flow field model of"high-speed train-windbreak-positive feeder"along with a finite element model of the positive feeder strand was established using numerical simulation.The galloping response of the positive feeder under train-induced wind,windbreak wall wake flow,and coupled wind field was systematically analyzed,and the fatigue characteristics under different wind loads were studied.The results show that when a train passes through a strong wind section with windbreak walls,a complex coupled wind field is generated with approximately 20％increase in instantaneous wind speed.The maximum galloping displacement and stress amplitude of the catenary's positive feeder increase by 14.28％and 44.96％,respectively.The service life of the positive feeder's steel core is reduced by about 74.42％.These findings reveal the wind-induced vibration and damage mechanisms of catenary systems under complex high-speed wind fields,providing a theoretical basis for wind-resistant design.关键词
接触网正馈线/列车风/耦合风场/舞动响应/寿命预测Key words
catenary positive feeder/train wind/coupled wind field/galloping response/life prediction分类
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张友鹏,王家安,赵珊鹏,葛磊蛟,李小平,王思华,郝志华..大风区段列车耦合风场对接触网正馈线风振及寿命的影响[J].中南大学学报（自然科学版）,2025,56(4):1686-1699,14.基金项目
国家自然科学基金资助项目(52467017) （52467017）
甘肃省自然科学基金资助项目(25JRRA174) （25JRRA174）
国铁集团系统性重大科技项目(P2024G001) （P2024G001）
中国铁路北京局集团有限公司科技研究开发计划项目(2024AGD03) （2024AGD03）
天津市自然科学基金多元投入重点项目(22JCZDJC00660)(Project(52467017)supported by the National Natural Science Foundation of China （22JCZDJC00660）
Project(25JRRA174)supported by the Natural Science Foundation of Gansu Province （25JRRA174）
Project(P2024G001)supported by the Systematic Major Science and Technology Projects of China Railway Group （P2024G001）
Project(2024AGD03)supported by the Science and Technology Research and Development Program of China Railway Beijing Group Co.Ltd. （2024AGD03）
Project(22JCZDJC00660)supported by the Key Project of Diversified Investment from Tianjin Natural Science Foundation) （22JCZDJC00660）
