A practical procedure for inverse wind load reconstruction from different response types for large degrees of freedom structures

In this paper a practical procedure for the wind load reconstruction inversely from the response measurements is presented. According to a previous study of the authors, the augmented impulse response matrix (IRM) of the structure can be generated for different response types i.e. displacement and acceleration. In this way, just the modal parameters of a system namely eigenfrequencies and-vectors as well as the damping ratios should be known. For the sake of higher accuracy and computational efficiency, the load identification is performed in the modal subspace by Tikhonov regularization, which demands to decompose the measured responses by means of the modal parameters into the modal responses. Through the numerical simulation of the problem based on a full-scale finite element model of an instrumented guyed mast, the acceleration and displacement responses are used to identify the applied wind load. The results show that displacement response is the more consistent response type for this wind load reconstruction procedure.