POD方法在重建双坡屋盖风压场中的应用  

APPLICATION OF POD TO RECONSTRUCTION OF WIND PRESSURE FIELDS ON PITCHED ROOF

作　　者：李方慧[1] 倪振华[2] 谢壮宁[2] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090 [2]汕头大学土木工程系,广东汕头515063

出　　处：《工程力学》2005年第S1期177-182,176,共7页Engineering Mechanics

基　　金：国家自然科学基金资助项目(50378052)

摘　　要：讨论了本征正交分解(POD)方法在重建双坡屋盖随机风压场上的应用。利用风洞试验同步测量了屋盖上非均匀分布的测压点的风压时间序列,借助相关矩阵和协方差矩阵本征值问题分析,分别对包含均值分量的随机风压场和不含均值分量的脉动风压场进行了重建。通过在时域和频域上与实测数据的对比分析说明了POD方法在重建双坡屋盖随机风压场中的有效性,总结了屋盖上不同区域脉动风压场重建的规律,并指出仅使用相关矩阵的第一阶本征模态就可以很好地重建屋盖的平均风压场。This paper discusses the application of Proper Orthogonal Decomposition (POD) to the reconstruction of the random wind pressure field acting on a pitched roof. The wind pressure time series at non-uniformly distributed pressure taps over the roof were measured simultaneously in a wind tunnel test. With the analysis of eigenvalue-problems of the correlation matrix and the covariance matrix, the random pressure field with the mean value and the fluctuating pressure field without the mean value were reconstruc...

关 键 词：结构工程 风荷载分析 本征正交分解 协方差矩阵 相关矩阵 风洞试验 双坡屋盖 风压场重建 

分 类 号：TU312.1[建筑科学—结构工程]