Output-only damage detection in beam structures using statistical analysis of Hilbert-Huang Transformation of measured response
Abstract »In this paper a new damage detection method is proposed based on correlation of Hilbert-Huang transformation of measured responses of beam structure. Intrinsic mode functions (IMFs) of dynamic responses of structure in measured points affected by a triangle pulse loading using empirical mode decomposition (EMD) are calculated. Hilbert transform is used to obtain instantaneous amplitude on first IMF. Accordingly, correlation coefficient of obtained instantaneous amplitude of damaged and undamaged structure responses are evaluated. A Finite Element model (FEM) of two spans continues beam structure is selected to estimate the efficiency of proposed method. The dynamic responses of beam at several points are obtained using analytical approach. Finally, the obtain results from analytical approach was verified based on the FEM, which illustrates that proposed method determined the location of damage with the acceptable accuracy.
Biography: my thesis was in structural health monitoring and also signal processing with Hilbert Huang transform. i just use this method for determining the damage location in structures such as bridge..... www.mkhosraviani.blogsky.com
Affiliation: Qazvin Islamic Azad University Department of Civil Engineering 34149 55345 Qazvin IranGhasemi, MajidGhasemi, Majid email@example.com
Biography: Assistant Professor and Head of Department
Dept. of Civil Engineering.
Islamic Azad Univ. of Qazvin
Affiliation: Islamic Azad University of qazivn Department of Civil Engineering Qazvin Iran*Contact