Analytical Model of Dynamic Wind Loads on Lattice Towers

Abstract:

Based on base balance technique in a boundary layer wind tunnel, the generalized force spectra and RMS coefficients of the first mode of three typical lattice towers in along-wind, across-wind as well as torsional directions were obtained. In light of these results, the analytical models of generalized force spectra of the first mode of the lattice towers were established by applying least-square method. These models are in good agreement with the experimental results obtain by wind tunnel tests, and a 2 -D or 3-D calculation method can be developed on the basis of the models to evaluate wind-induced dynamic responses of typical lattice towers in frequency domain.