【摘要】 基于多分辨率分析的思想,利用正交小波基小波系数与功率谱密度函数的关系,以Davenport谱作为目标谱,通过逆小波变换,模拟出互不相关的风速时程,并考虑空间相关性,将其转换为具有空间相关性的风场。通过算例分析了所模拟风场各点风速时程的功率谱密度函数和互相关函数,均与目标值符合较好,证明了该方法的可行性和有效性。所模拟的空间相关性风场,可为结构风振时程分析提供荷载输入。更多还原

【Abstract】 A simulation method of wind field with spatial correlation by inverse wavelet transform is presented.According to the idea of multiresolution analysis and the relation between wavelet coefficients and power spectral density function,using Davenport power spectral density function as simulated target spectrum,wind velocity histories without spatial correlation are generated.Then the histories are transformed wind field with spatial correlation by a transform algorithm.By an example,it is found that the simulated power spectral densities and cross correlation functions are consistent with prescribed power spectral density and target cross correlation functions respectively and the method is valid.The simulated wind field with spatial correlation can be used to analysis wind-induced dynamic response as load input.更多还原