中国铁道科学2018，Vol.39Issue(2)：103-111,9.DOI:10.3969/j.issn.1001-4632.2018.02.13
350～400km·h-1高速列车作用于声屏障的脉动风荷载特性研究
Research on Fluctuating Wind Load Characteristics of Sound Barrier under Action of G-Series High-Speed Train with Speed of 350～400 km · h-1
摘要
Abstract
Aiming at the problem of the fluctuating wind load acting on the sound barrier caused by G-series high-speed train with the speed of 350～400 km · h-1,based on 3D unsteady k-ε two-equation turbulence model,the dynamic wind field processes of trains passing sound barrier zone at different speeds with different distances between the sound barrier and track center line were simulated and analyzed by using moving mesh method.The time-history curves of fluctuating wind load on various parts of sound barrier and the influence laws of various parameters were obtained,and were compared with the measured data.Results show that the fluctuating wind load of train with the speed of 300～400 km · h-1 increases with the increasing of train speed,and presents an approximate hyperbolic inverse relationship with the distance between sound barrier and line center.The distribution of wind pressure value along the height of sound barrier shows the law of larger on the bottom and smaller on the top.The wind pressure values obtained by theoretical calculation agree well with the time-history curves of the measured fluctuating wind load and the influence laws of parameters.Some calculated air pressure values are slightly larger than the measured ones.The reason is that the simulation methods of train and sound barrier models with smooth surface ignore the factors such as the wind resistance of the actual rough surface in calculation.Based on simulation and measured results,the maximum value of the wind pressure caused by G-series high-speed train with the speed of 380～400 km · h-1 is proposed and the dynamic design in the generalized vibration frequency range of 1.96～4.79 Hz is also suggested.关键词
高速铁路/声屏障/列车脉动风荷载/风压值/谱特性Key words
High speed railway/Sound barrier/Fluctuating wind load of train/Wind pressure value/Spectrum characteristics分类
交通工程引用本文复制引用
施洲,杨仕力,蒲黔辉,邓跞..350～400km·h-1高速列车作用于声屏障的脉动风荷载特性研究[J].中国铁道科学,2018,39(2):103-111,9.基金项目
国家自然科学基金青年科学基金资助项目(51408496) （51408496）
