Impact load identification and response reconstruction based on updating-combination regularization
An impact load identification and structural response reconstruction method based on the updating-combination regularization was proposed aiming at the problems of low accuracy in identifying peak impact loads,oscillation in identifying non loading areas,and susceptibility to noise interference in traditional regularization methods for structural response reconstruction.The reconstruction equations for the impact load and structure response were derived based on the state space model.The difference between the denoised response and the identification response was used to update the L2 regularization solution.Then higher accuracy peak identification results were obtained combining with the L1 regularization solution that had sparsity advantage while ensuring the stability of the identification of impact load in unloaded region,which realized the reconstruction of structural dynamic responses.The proposed method was verified through numerical and experimental cases,and the effect of response reconstruction based on the transfer matrix method and the particle filter method was compared.Results show that the proposed method has good anti-noise performance.The method can accurately recognize the impact load,and effectively reconstruct the dynamic response of the structure.
NETL
NSTL
万方数据
维普
