Abstract:

Using a spectral representation method in the theory of stochastic simulation, and the fast Fourier transform (FFT) technology, fluctuating wind fields around two typical structures are simulated with MATLAB. Time-history curves of fluctuating wind at some nodes are presented. Correlation of different points on the structure is considered. Various methods have been used to verify correctness of the numerical results. The program is showed to be very efficient with the FFT. Meanwhile, precision of the traditional spectral representation is preserved. It is found that the simulation results of fluctuating wind well meet the requirement of engineering analysis.

Key words: stochastic process; numerical simulation; fluctuating wind field; spectral representation