风载荷作用下大型敞口储罐变形响应分析  

Analysis of fluctuating-wind-induced deformation response of open-topped cylindrical steel storage tanks

作　　者：郝笑笑 胡瑾秋[1] 刘文才 牛蕴 HAO Xiaoxiao;HU Jinqiu;LIU Wencai;NIU Yun(College of Mechanical and Transportation Engineering,China University of Petroleum,Beijing 102249,China;CNPC Research Institute of Safety ＆ Environment Technology,Beijing 102206,China)

机构地区：[1]中国石油大学(北京)机械与储运工程学院,北京102249 [2]中国石油集团安全环保技术研究院,北京102206

出　　处：《中国安全科学学报》2018年第6期110-115,共6页China Safety Science Journal

基　　金：国家自然科学基金资助(51574263);国家重点研发计划项目(2017YFC0805801);北京市科技新星计划项目(Z181100006218048);中国石油大学(北京)青年创新团队C计划项目(C201602)

摘　　要：为提升储罐结构安全性设计水平,以10万m3的大型变壁厚钢制储罐为研究对象,利用ANSYS三维仿真模型,分别进行基于《建筑结构载荷规范》的平均风作用下的储罐结构静力学位移计算分析,以及脉动风荷载作用下储罐的风致动力响应分析,并将静力分析和动力学分析下的位移响应结果进行比较。结果表明：在基本风压为1 000 Pa的条件下,120 s脉动风激励时程内储罐的最大径向位移瞬时峰值为7.76 mm,近似为平均风作用下静力分析结果的2.2倍;此外,储罐不同典型位置节点处的位移风振系数差异性不显著,储罐设计中可将储罐的整体位移风振系数取为2.2。To improve the safety design level of cylindrical steel storage tanks,numerical modeling of a10×104 m3 floating roof tank was carried out by using the finite element software ANSYS. A static analysis of tank under the average wind effect based on the ＂ code of building load＂ was performed. Also,dynamic displacement response under fluctuating wind loading was evaluated through the time-history analysis. A further comparison was made between the two analysis results. The results show that under the basic wind pressure of 1 000 Pa,the peak value of the maximum of radial displacement of tank during the excitation time of 120 s is 7. 76 mm,which has been estimated 120% greater than that under static wind loading.Moreover,the variation observed among the gust displacement factors at different key nodes is not significant,and that the overall displacement wind vibration coefficient of the storage tank can be taken as 2. 2.

关 键 词：储罐 风载荷 脉动风 平均风 动力时程分析 位移风振系数 

分 类 号：X937[环境科学与工程—安全科学]