Paper Title:
Using the Detection and Relative Damage Quantification Indicator (DRQ) with Transmissibility
  Abstract

The Detection and Relative Damage Quantification Indicator (DRQ) was presented previously as a reliable damage detection indicator when used with Operational Deflection Shapes (ODS). The DRQ was computed from the Response Vector Assurance Criterion (RVAC) between the damaged and the initial ODS and the resulting value proved to be a good indicator of the presence of damage. The use of the ODS implies that the loads applied to the structure with and without damage are either known or, at least, the same. If the forces are not deterministic but still ergodic, the power spectrum could be used to evaluate the ODS, but still the above conditions hold, in a statistical sense. When a structure is subjected to ambient excitation, those conditions can hardly be assured. The loads may vary quite significantly and the ODS changes may be due to those changes instead of the presence of damage. To avoid this handicap, the authors explore here the use of the Transmissibility functions. If properly defined, the Transmissibility is invariant with respect to the amplitude of the loads. Since the Displacement Transmissibility is load invariant, a picked set of responses can be measured in service and used to predict another set; the result will then be correlated to the actual values using the RVAC and the DRQ will be computed. Numerical and experimental examples illustrate the proposed technique.

  Info
Periodical
Edited by
L. Garibaldi, C. Surace, K. Holford and W.M. Ostachowicz
Pages
455-460
DOI
10.4028/www.scientific.net/KEM.347.455
Citation
N.M.M. Maia, A.M.R. Ribeiro, M. Fontul, D. Montalvão, R.P.C. Sampaio , "Using the Detection and Relative Damage Quantification Indicator (DRQ) with Transmissibility", Key Engineering Materials, Vol. 347, pp. 455-460, 2007
Online since
September 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: John E. Mottershead, Andreas Kyprianou, Hua Jiang Ouyang
157
Authors: Julia Armesto, Pedro Arias, Celestino Ordóñez, Henrique Lorenzo, Natalia Caparrini
Abstract:The measurement and monitoring of structural damages in masonry monuments is an important task in the field of conservation and restoration...
291
Authors: Jacek Chrapoński, Marian Maliński, Janusz Szala, Jan Cwajna
Abstract:The distance functions such as G(r), K(r), H(r), g(r) and systematic scanning method connected with variance analysis have been used for...
153
Authors: Michael I. Friswell, Yong Yong He
Abstract:The concept that changes in the dynamic behaviour of a rotor could be used for general fault detection and monitoring is well established....
423
Authors: Ignacio Herrera, Hui Su, Stefan Kaczmarczyk
Abstract:In predictions of the dynamic behaviour of an elevator car system, it is important to take into account the influence of passengers’...
128