超高层建筑表面脉动风压空间相关特性试验研究  

Fluctuating pressure correlativity test analysis on super-tall buildings

作　　者：魏奇科[1] 李正良[1] 黄汉杰[2] 孙毅[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]中国空气动力研究与发展中心,四川绵阳621000

出　　处：《实验流体力学》2010年第5期63-69,共7页Journal of Experiments in Fluid Mechanics

基　　金：国家自然科学基金重大研究计划(90715024);重庆大学研究生创新团队项目(200909C1017)

摘　　要：通过对某超高层建筑模型同步测压风洞试验,分别从时域和频域对模型各表面典型测点脉动风压水平和竖向空间相关性系数、以及水平和竖向相干函数进行了全面深入分析。与相关参考文献中提出的经典风速相干函数表达式进行了比较,给出了侧风面脉动风压相干函数考虑涡旋脱落影响的新的数学模型,拟合了公式参数,得到的结果可为建立更为精细的气动力模型所参考。Through the precise simultaneous pressure measurement wind tunnel test of one super-tall building,the relative coefficient and coherence function in horizontal and vertical directions are analyzed deeply and comprehensively.The results have been compared with the classical coherence function of the wind in many related literatures and some important conclusions have been finally drawn.Considering the vortex shedding,the new mathematical model of the coherence function between the fluctuating wind pressures on the crosswind side has been proposed and the parameters of the model have been fitted.The finally result can provide reference for the more precise aerodynamic model.

关 键 词：超高层建筑 脉动风压 相关性系数 相干函数 涡旋脱落 

分 类 号：TU973.213[建筑科学—结构工程]