作　　者： ; ; ; ;

机构地区： 武汉大学土木建筑工程学院

出　　处： 《武汉理工大学学报》 2013年第7期83-88,共6页

摘　　要： 对某大跨度曲面屋盖结构分批进行了风洞试验,第1批测点定义为同步测点,第2批测点定义为非同步测点。根据POD方法采用前若干阶本征模态重建了屋盖的风压场。通过同步测点的风压场预测非同步测点的风压场,并将其与实测非同步风压场进行对比。结果表明,预测风压场与实测风压场吻合较好,说明POD方法在风压预测应用中是有效的。根据随机振动理论,通过风荷载相干函数分析,建立同步与非同步风荷载的相关性,从而提出一种考虑非同步风场的风荷载计算方法。 Wind tunnel tests on a large-span curved roof structure were taken in two batches,of which the first batch of data were treated as synchronously measured ones and the second batch were taken as asynchronously measured ones that were relative to the first batch.According to the fundamental principal of POD（Proper Orthogonal Decomposition） method,wind pressure fields on the roof can be reconstructed by only first several intrinsic modes.Wind pressures of asynchronous measuring taps were predicted through data of synchronous measuring taps based on POD method,and the results show that predicted wind pressures and the measured ones are in good match,which illustrat the POD method is effective.Finally.Based on the predicted results,a wind loads calculation method of the large-span roof structures was proposed through the coherent function which establish the correlation of asynchronous and synchronous wind loads.

关 键 词： 本征正交分解 风洞试验 风场重建 风压预测 相干函数

领　　域： [经济管理]