强风作用下大型双曲冷却塔风致振动参数分析  

Parameter Analysis of Wind-induced Vibration for Large Hyperbolic Cooling Towers under Strong Wind Loads

作　　者：柯世堂[1] 侯宪安[2] 姚友成[2] 梁娅莉[2] 王法武[1] 

机构地区：[1]南京航空航天大学土木工程系,江苏南京210016 [2]中国电力工程顾问集团西北电力设计院,陕西西安710075

出　　处：《湖南大学学报（自然科学版）》2013年第10期32-37,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51208254);江苏省自然科学基金资助项目(BK2012390);博士后科研基金资助项目(2013M530255;1202006B);南航科研专项资助项目(NN2012024;56YAH12010);江苏高校优势学科建设工程资助项目

摘　　要：基于作者已提出的大型冷却塔风振计算方法(一致耦合法),结合风洞测压试验获得的表面气动力模式,分析了结构本身因素和外界干扰对强风作用下冷却塔结构风致振动的影响,对不同动力特性及阻尼比的冷却塔模型进行了风振响应背景、共振、耦合项及风振系数的精细化数值计算,对比并初步探索了周边干扰下大型冷却塔的风振机理.发现了特征尺寸、阻尼比和周边干扰对冷却塔风振响应的影响规律,为进一步理解冷却塔结构风致振动现象,避免不利共振的产生及采取相应的控制措施提供了有益的结果.In accordance with the consistent coupled method （Consistent Coupled Method,CCM） proposed by the author,and by combining the wind loads distribution by wind tunnel tests,the influence of structural dynamic characteristics of wind-induced vibrations for cooling towers under strong wind loads were investigated.For simplified structure models with different base frequencies and damping ratios,the response simulations of wind-induced vibration,such as background term,resonant term,cross term and wind-induced vibration coefficients,were performed.And then,the mechanism of wind-induced vibration for large cooling towers with interference effect was studied.From the simulations,some features of base frequencies,damping ratio and interference effect were found.The results in this paper are useful for both the promotion of the understanding of resonant vibration and the avoidance and control of this kind of vibration.

关 键 词：参数分析 大型双曲冷却塔 风洞试验 风致振动 一致耦合法 

分 类 号：TU279.741[建筑科学—建筑设计及理论] TU332