中南大学学报（自然科学版）2024，Vol.55Issue(5)：1782-1792,11.DOI:10.11817/j.issn.1672-7207.2024.05.011
强横风下高速列车外风挡非定常气动载荷特性研究
Unsteady aerodynamic load characteristics of outer windshields of high-speed train in strong crosswind
摘要
Abstract
As trains accumulate more service time,the external windshield becomes susceptible to deformation,cracking,and other malfunctions under harsh operational conditions,posing a threat to operational safety.To analyze the displacement,stress and variations in aerodynamic excitation of the external windshield in adverse environments,numerical simulation methods were employed based on the theory of fluid-structure interaction vibration.The aerodynamic performance and fluid-structure coupling characteristics of the external windshield of high-speed trains operating at speeds of 250 km/h in different crosswind conditions were analyzed.The results show that the external windshield at various positions on the train experiences the maximum displacement and stress in the leeward wake region,with these effects increasing with crosswind speed.Regarding aerodynamic force frequency,the main frequencies of the aerodynamic forces on the external windshield are relatively concentrated,showing small fluctuations around a fixed value at different positions.Considering both displacement and aerodynamic excitation,there is a good correspondence in the overall trend,with the displacement response slightly lagging behind the aerodynamic excitation.关键词
流固耦合/高速列车/外风挡/强横风/气动特性Key words
fluid-structure interaction/high-speed train/outer windshield/strong crosswind/aerodynamic performance分类
交通工程引用本文复制引用
史永达,徐晔,李雪亮,杨明智..强横风下高速列车外风挡非定常气动载荷特性研究[J].中南大学学报（自然科学版）,2024,55(5):1782-1792,11.基金项目
中国国家铁路集团有限公司科技研究开发计划项目(P2021J035)(Project(P2021J035)supported by the Science and Technological Research Plan of China State Railway Group Co.,Ltd.) （P2021J035）
