Efficient simulation method for large-scale structure random turbulent wind field

The invention discloses an efficient simulation method for a large-scale structure random turbulent wind field, which comprises the following steps: separating a 3nV-1D random vector process into two unrelated 2nV-1D and nV-1D random vector processes, simulating the 2nV-1D process by adopting an intrinsic orthogonal decomposition-spectral representation hybrid method, and simulating the nV-1D process by adopting a spectral representation method; secondly, a random function is constructed to replace orthogonal random variables in the two random vector processes, and the number of the random variables is reduced to the maximum extent; meanwhile, an FFT algorithm is introduced to further improve the simulation efficiency; and finally, selecting a proper power spectrum model and a proper space and turbulence coherence function model, so that efficient simulation of the large-scale structure random turbulence wind field can be carried out. Compared with a traditional double-intrinsic orthogonal decomposition model