Computer simulation of structural random loading identification

Loading identification has long been a difficult problem for multi-input-mu lti-output stationary random vibration problems. In this paper, the inverse pseudo-excitation method is developed for dealing with such identification problems. Numerical simulations are used to reveal the difficulties in suc h problems, and some numerical analysis measurements are suggested, which m ay be very useful in the setting up and processing of experimental data so as to obtain reasonable predictions of the input loading from selected stru ctural responses, e.g. a few structural displacements or strains, or a comb ination of them. It is shown that computer simulation is a very cheap way o f overcoming the problem of which responses to measure on real structures i n order to identify the power spectral density matrix of the applied forces . (C) 2000 Elsevier Science Ltd. All rights reserved.