A new scenario-based approach to damage detection using operational modal parameter estimates

Abstract In this paper a vibration-based damage localization and quantification method, based on natural frequencies and mode shapes, is presented. The proposed technique is inspired by a damage assessment methodology based solely on the sensitivity of mass-normalized experimental determined mode shapes. The present method differs by being based on modal data extracted by means of Operational Modal Analysis (OMA) combined with a reasonable Finite Element (FE) representation of the test structure and implemented in a scenario-based framework. Besides a review of the basic methodology this paper addresses fundamental theoretical as well as practical considerations which are crucial to the applicability of a given vibration-based damage assessment configuration. Lastly, the technique is demonstrated on an experimental test case using automated OMA. Both the numerical study as well as the experimental test case presented in this paper are restricted to perturbations concerning mass change.

[1]  Hong Hao,et al.  Civil structure condition assessment by FE model updating: methodology and case studies , 2001 .

[2]  P. Hansen.  Rank-Deficient and Discrete Ill-Posed Problems: Numerical Aspects of Linear Inversion , 1987 .

[3]  Randall J. Allemang,et al.  Topics in Modal Analysis II, Volume 6 , 2014 .

[4]  Dionisio Bernal,et al.  Modal Scaling from Known Mass Perturbations , 2004 .

[5]  Michael Link,et al.  Damage identification by multi-model updating in the modal and in the time domain , 2009 .

[6]  Fabrizio Vestroni,et al.  Dynamic methods for damage detection in structures , 2008 .

[7]  D. Bernal.  Load Vectors for Damage Localization , 2002 .

[8]  Pizhong Qiao,et al.  Vibration-based Damage Identification Methods: A Review and Comparative Study , 2011 .

[9]  Rune Brincker,et al.  Modal scaling in operational modal analysis using a finite element model , 2013 .

[10]  Charles R. Farrar,et al.  Damage identification and health monitoring of structural and mechanical systems from changes in their vibration characteristics: A literature review , 1996 .

[11]  Guido De Roeck,et al.  The Local Flexibility method for Vibration-based damage localization and quantification , 2008 .

[12]  S. R. Ibrahim,et al.  Modal Parameter Identification from Responses of General Unknown Random Inputs , 1995 .

[13]  J. Junkins,et al.  Optimal Estimation of Dynamic Systems , 2004 .

[14]  Carlos E. Ventura,et al.  Introduction to Operational Modal Analysis: Brincker/Introduction to Operational Modal Analysis , 2015 .

[15]  E. Parloo,et al.  DAMAGE ASSESSMENT USING MODE SHAPE SENSITIVITIES , 2003 .

[16]  Branislav Titurus,et al.  Damage detection using successive parameter subset selections and multiple modal residuals , 2014 .

[17]  John E. Mottershead,et al.  The sensitivity method in finite element model updating: A tutorial (vol 25, pg 2275, 2010) , 2011 .

[18]  Hoon Sohn,et al.  A review of structural health monitoring literature 1996-2001 , 2002 .

[19]  L. Mevel,et al.  Statistical model-based damage detection and localization: subspace-based residuals and damage-to-noise sensitivity ratios , 2004 .

[20]  R. Guyan.  Reduction of stiffness and mass matrices , 1965 .

[21]  Paul Sas,et al.  Modal Analysis Theory and Testing , 2005 .