三种典型子午线型大型冷却塔风致响应分析  

WIND-INDUCED RESPONSE ANALYSIS FOR LARGE COOLING TOWER WITH THREE TYPICAL MERIDIAN CURVES

作　　者：王浩[1] 柯世堂[1] 

机构地区：[1]南京航空航天大学土木工程系,南京210016

出　　处：《力学与实践》2015年第6期690-697,共8页Mechanics in Engineering

基　　金：国家自然科学基金(51208254);江苏省自然科学基金(BK2012390);中国博士后基金一等资助(2013M530255);江苏省博士后科学基金(1202006B)资助项目

摘　　要：为研究大型双曲冷却塔不同子午线型对其在风荷载作用下强度和稳定的影响,根据某实际工程建立有限元模型,分析了不同子午线型对冷却塔动力特性的影响,比较了规范静风载荷作用下不同线型冷却塔塔筒和支柱风致响应的差异,探讨了线型变化对冷却塔稳定性的影响.结果表明:子午线型的优化在冷却塔结构设计中是十分必要的,"矮胖"型冷却塔基频更高,但其抗风承载性能和稳定性比"高瘦"型塔弱,风致内力和位移响应也较大.This paper studies the influence of different meridian curves of a large hyperbolic cooling tower on the wind-induced response and the stability performance, by modeling in finite elements according to engineering situations, with considerations of the effect of the tower height, the wall thickness and the air intake height on the dynamic behavior of the structure and the wind-induced response. The influence mechanism for different curve types is analyzed and the wind-induced responses of the tower barrel and the pillar are compared under standard wind loads. Besides, the influence of the linear change on the cooling tower overall and local stability is also explored. It is shown that the optimization of the meridian curve is necessary. A little ＂shorter and fatter＂ tower type enjoys a higher structure fundamental frequency, but its wind load-carrying properties and stability are not as satisfactory as a ＂tall and slim＂ towel type. Furthermore, its displacement response is larger.

关 键 词：大型双曲冷却塔 子午线型 风致响应 稳定性分析 参数分析 

分 类 号：TU332[建筑科学—结构工程]