A comparative study on book shelf structure based on different domain modal analysis

Ardalan Sabamehr; Timir Baran Roy; Ashutosh Bagchi

doi:10.1117/12.2260025

Abstract

Structural Health Monitoring (SHM) based on the vibration of structures has been very attractive topic for researchers in different fields such as: civil, aeronautical and mechanical engineering. The aim of this paper is to compare three most common modal identification techniques such as Frequency Domain Decomposition (FDD), Stochastic Subspace Identification (SSI) and Continuous Wavelet Transform (CWT) to find modal properties (such as natural frequency, mode shape and damping ratio) of three story book shelf steel structure which was built in Concordia University Lab. The modified Complex Morlet wavelet have been selected for wavelet in order to use asymptotic signal rather than real one with variable bandwidth and wavelet central frequency. So, CWT is able to detect instantaneous modulus and phase by use of local maxima ridge detection.

Citation Download Citation

Ardalan Sabamehr, Ardalan Sabamehr, Timir Baran Roy, Timir Baran Roy, Ashutosh Bagchi, Ashutosh Bagchi, "A comparative study on book shelf structure based on different domain modal analysis", Proc. SPIE 10170, Health Monitoring of Structural and Biological Systems 2017, 101703B (8 May 2017); doi: 10.1117/12.2260025; https://doi.org/10.1117/12.2260025

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