高耸烟囱风致响应精细化计算方法  

Fine calculation method of wind-induced response of high-rise chimneys

作　　者：孙梦然 刘仰昭 戴靠山 丁志斌 尹业先 SUN Mengran;LIU Yangzhao;DAI Kaoshan;DING Zhibin;YIN Yexian(College of Architecture and Environment,Sichuan University,Chengdu 610065,P.R.China;MOE Key Laboratory of Deep Underground Science and Engineering,Sichuan University,Chengdu 610065,P.R.China;Failure Mechanics&Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan Province,Sichuan University,Chengdu 610065,P.R.China;SEPCOⅢElectric Power Construction Co.,Ltd.,Qingdao 266100,Shandong,P.R.China)

机构地区：[1]四川大学建筑与环境学院,成都610065 [2]四川大学深地科学与工程教育部重点实验室,成都610065 [3]四川大学破坏力学与防灾减灾四川省重点实验室,成都610065 [4]山东电力建设第三工程公司,山东青岛266100

出　　处：《土木与环境工程学报（中英文）》2024年第2期117-128,共12页Journal of Civil and Environmental Engineering

基　　金：国家自然科学基金(51878426,52108463)。

摘　　要：高耸烟囱的风致响应可分为顺风向响应和横风向响应,其中顺风向响应以大气脉动风引起的抖振响应为主,横风向响应以Karman旋涡脱落引起的涡激振动为主,准确地预测和评估这两种风致响应对其抗风设计和结构安全性至关重要。在Tamura提出的二维平面尾流振子模型的基础上进一步推导,将该模型成功运用在三维结构上,提出可用于实际工程结构的有限元迭代计算方法,为高耸烟囱类结构横风向涡振响应的计算提供了新的方法。此外,基于结构的固有模态坐标,建立了适用于高耸烟囱耦合抖振响应分析的有限元CQC频域计算方法,并将频域计算结果与时域计算结果对比。结果表明:有限元迭代计算方法可以有效地计算三维烟囱的涡振响应,烟囱抖振响应频域计算和时域计算结果吻合良好。The wind-induced response of a high-rise chimney can be divided into along-wind response and across-wind response.The along-wind responses are dominated by buffeting vibrations caused by flow turbulence.The across-wind responses are dominated by vortex-induced vibrations(VIVs)caused by Karman vortex shedding.Accurate assessment of these two kinds of wind-induced responses is critical to the windresistants design and structural safety of strustures.The two-dimensional wake oscillator model established by Y.Tamura is further derived and successfully applied to the three-dimensional structure in the present study.An iterative calculation method for practical engineering structures is proposed,which provides a new field of vision for VIV predictions of chimney structures.In addition,a complete quadratic combination(CQC)method in the frequency domain is developed for buffeting predictions of high-rise chimneys.The results of frequency domain calculation are compared with those of time domain calculation.The results show that the iterative calculation method can effectively predict the VIV responses of three-dimensional chimneys,and the buffeting responses calculated in the frequency domain are in good agreement with that obtained in time-domain.

关 键 词：高耸烟囱 结构风工程 涡激共振 抖振 有限元方法 

分 类 号：TU311.3[建筑科学—结构工程]