Applicability of an output-only structural damage detection based on transmissibility measurements and kernel principal component analysis

A. Santos, M. F. M. Silva, R. Santos, E. Figueiredo, N. M. M. Maia, J. C. W. A. Costa

DOI: 10.14209/sbrt.2018.260

Evento: XXXVI Simpósio Brasileiro de Telecomunicações e Processamento de Sinais (SBrT2018)

Keywords: Structural health monitoring Transmissibility measurements Damage detection Kernel principal component analysis

Abstract

Frequency response functions have been employed as damage-sensitive features in the vibration-based structural damage detection. The need for measuring the excitation forces arises as a remarkable limitation on the application of those features in real-world applications. Transmissibility measurements can be explored as features with output-only nature, which imply the need for measuring only the response signals. Thus, an output-only damage detection method is proposed, combining transmissibilities with kernel principal component analysis. The results performed on transmissibility measurements from a laboratory steel beam reveals that the output-only method has high potential to be applied in a wide range of monitoring solutions.

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