北京建筑大学学报2023，Vol.39Issue(6)：80-88,9.DOI:10.19740/j.2096-9872.2023.06.10
筒壳网架在瞬时强风作用下的风振响应分析
Wind-Induced Vibration Response Analysis of Cylindrical Shell Grid Structure under Instantaneous Strong Wind Excitation
摘要
Abstract
In August 2017,a long-span double cylindrical shell dry coal shed grid of a power plant in North China was subjected to local collapse of the structure under the action of transient strong winds.Taking this engineering case as the research object,the wind vibration response of the collapsed part of the grid structure under the action of transient strong winds was simulated and analyzed using the STADS with the help of Matlab and Fluent platforms.Firstly,based on Matlab platform,the multi-point input non-stationary wind speed spectrum is generated using the harmonic superposition method,and then the accurate Fluent wind engineering calculation model is generated using the conversion procedure of STADS.Secondly,the generated multi-point input non-stationary pulsation wind is introduced into the flow field by UDF definition,and the transient calculation of the instantaneous strong wind is carried out using Large Eddy Simulation(LES)to obtain the wind pressure time series at the surface of the structure and then converted into the nodal pressure time series.Finally,the time course analysis was carried out by returning to STADS using the Newmark method to calculate the displacement time series at each point and then obtain the displacement wind vibration coefficient at the collapse site.The STADS conversion procedure improves the efficiency of the transient wind field simulation of cylindrical shell grid structure and deepens the understanding of the wind vibration response of the structure under non-stationary wind field.It is used as a reference for the wind resistance design of such large-span grid structures.关键词
大跨网架结构/非平稳强风/计算风工程/瞬态风场/风振分析Key words
long-span grid structure/non-stationary strong wind/computational wind engineering/fluctuating wind field/wind vibration analysis分类
建筑与水利引用本文复制引用
门佳禹,王孟鸿,白泽升..筒壳网架在瞬时强风作用下的风振响应分析[J].北京建筑大学学报,2023,39(6):80-88,9.基金项目
国家自然科学基金项目(51578038). （51578038）
