The empirical mode decomposition for removing displacement drift in structural earthquake responses
Jianxin Liu · 2009
Will come into being drift,when the large-mass is adopted to analyze the structural earthquake responses.A new algorithm to remove this drift components based on empirical mode decomposition(EMD) is put forward,which regards the drift component as the residue of EMD,separates and removes the residue from original signal of time history response data by using EMD,reconstructs the response signal though using intrinsic mode functions(IMF) of EMD.Then the displacement response signal approximated to real one is obtained.By applying the method to analyse earthquake time history responses of real bridge structures,the difficult problem of removing displacement drift from time histry data is successfully solved.The results of trial and true calculations are precise,so it can be used for the structural earthquake response analysis.