本征正交分解法在曲面模型风场重构中的应用

大跨空间结构模型（在风洞试验中）能同步测量的测点常相对有限，需采用有效风场重构技术通过有限点同步测量结果得到全表面风压分布的动态信息．介绍了本征正交分解法在这一问题中的应用，并对基于球面及柱面壳体模型风洞试验得到的风压数据进行了比较验证．结果表明，该方法对曲面模型具有很强的适用性，能够有效地整体把握这类模型表面风压分布规律，可为大跨空间结构抗风时程分析中风荷载分析提供很好的帮助．

Application of the Proper Orthogonal Decomposition Method to Wind Field Reconstruction of Models with Curved Surfaces

Since of the measurement points which can be sampled simultaneously in wind tunnel tests are very relatively limited for large-span spatial structures, a reconstruction of the measured wind field is indispensable for obtaining the dynamic distribution of wind pressure on the whole surface on the basis of the information from the limited measurement points. The proper orthogonal decomposition method is introduced in this paper for this problem. Based on the data obtained from wind tunnel tests of a spherical and a cylindrical shell models, an analysis is made of the efficiency of this methool. Results show that this method is suitable for the problem of the models with curved surfaces. In addition, it is helpful to integrally understand the distribution regulation of wind pressure on the whole surface, and to offer great convenience in wind loading analysis for time-history dynamic analysis of the windinduced vibration of large-span spatial structures.