| 130 | 4 | 205 |
| 下载次数 | 被引频次 | 阅读次数 |
为研究200 m级特大型冷却塔风振系数取值问题,以国内在建的某特大型冷却塔(200 m)为例,采用大涡模拟(LES)方法获得该冷却塔表面三维气动力时程,并与国内外大型冷却塔实测结果对比,验证了数值模拟的有效性.在此基础上,结合有限元方法和风振时程分析理论对该冷却塔的动力特性、风振响应与风振系数进行了系统分析,提炼出此类特大型冷却塔二维风振系数的分布规律,最终给出了以正迎风面子午向轴力为目标的整体风振系数取值.所得出的主要研究结论可为此类200 m级超规范特大型冷却塔的风荷载设计取值提供参考.
Abstract：With a under-constructed domestic 200 m large cooling tower as an example,the wind vibration coefficient of super large cooling towers was systematically studied. Numerical wind tunnel test was conducted by adopting the large eddy simulation( LES) method to obtain the three-dimensional aerodynamic force time history. The outcomes of simulation were compared with that from field measurements and wind tunnels. The results showed the rationality of LES method. In this way,the dynamic property,wind-induced response and wind vibration coefficient were analyzed systematically. The regularities of distribution of two-dimensional wind vibration coefficient of 200 m super large cooling tower was extracted. Finally,the wind vibration coefficient of this super large cooling tower was suggested. These findings could provide scientific basis for the wind resistance design of such 200 m super large cooling towers.
[1]柯世堂,侯宪安,姚友成,等.大型冷却塔结构抗风研究综述与展望[J].特种结构,2012(6):5-10.
[2]柯世堂,赵林,葛耀君.超大型冷却塔结构风振与地震作用影响比较[J].哈尔滨工业大学学报,2010,42(10):1635-1641.
[3]武际可.大型冷却塔结构分析的回顾与展望[J].力学与实践,1996,18(6):1-5.
[4]王浩,柯世堂.三种典型子午线型大型冷却塔风致响应分析[J].力学与实践,2015,37(6):690-697.
[5]中国住房和城乡建设部.工业循环水冷却设计规范:GB/T 50102-2014[S].北京:中国计划出版社,2014.
[6]电力行业电力规划设计标准化技术委员会.火力发电厂水工设计技术规范:DL/T 5339-2006[S].北京:中国电力出版社,2006.
[7]柯世堂,侯宪安,姚友成,等.强风作用下大型双曲冷却塔风致振动参数分析[J].湖南大学学报(自然科学版),2013,40(10):32-37.
[8]柯世堂,初建祥,陈剑宇,等.基于灰色-神经网络联合模型的大型冷却塔风效应预测[J].南京航空航天大学学报,2014,46(4):652-658.
[9]KE S T,LIANG J,ZHAO L,et al.Influence of ventilation rate on the aerodynamic interference for two IDCTs by CFD[J].Wind and structures,an international journal,2015,20(3):449-468.
[10]吴义章,张幸涛,李会知,等.高层建筑周围行人高度风环境的数值模拟研究[J].郑州大学学报(理学版),2011,43(4):110-115.
[11]NISHIMURA H,TANIIKE Y.Aerodynamic characteristics of fluctuating forces on a circular cylinder[J].Journal of wind engineering&industrial aerodynamics,2001,89(1):713-723.
[12]CHENG X X,ZHAO L,GE Y J,et al.Wind pressures on a large cooling tower[J].Advances in structural engineering,2015,18(2):201-220.
基本信息:
DOI：10.13705/j.issn.1671-6841.2016347
中图分类号:TU311.3
引用信息:
[1]刘东华,王金玺,柯世堂.基于大涡模拟特大型冷却塔风振系数取值研究[J],2017,49(01):114-119.DOI:10.13705/j.issn.1671-6841.2016347.
基金信息:
国家自然科学基金项目(51208254)
2016-12-20
2016
2017-01-09
2017
2