Experimental validation of a finite-element model updating procedure

This paper validates an approach to damage detection and localization based on finite-element model updating (FEMU). The approach has the advantage over other existing methods to FEMU that it simultaneously updates all three finite-element model matrices at the same time preserving their structure (connectivity), symmetry and positive-definiteness. The approach is tested in this paper on an experimental setup consisting of a steel cable, where local mass changes and global change in the tension of the cable are introduced. The new algorithm is applied to identify the size and location of different changes in the structural parameters (mass, stiffness and damping). The obtained results clearly indicate that even small structural changes can be detected and localized with the new method. Additionally, a comparison with many other FEMU-based methods has been performed to show the superiority of the considered method.

[1]  Philip D. Cha,et al.  MODEL UPDATING USING AN INCOMPLETE SET OF EXPERIMENTAL MODES , 2000 .

[2]  M. Friswell,et al.  Direct Updating of Damping and Stiffness Matrices , 1998 .

[3]  Youn-sik Park,et al.  An improved updating parameter selection method and finite element model update using multiobjective optimisation technique , 2004 .

[4]  M. Baruch,et al.  DAMAGE DETECTION BASED ON REDUCED MEASUREMENTS , 1998 .

[5]  H. Saunders,et al.  Finite element procedures in engineering analysis , 1982 .

[6]  Bart Peeters,et al.  System identification and damage detection in civil engineering , 2000 .

[7]  Michel Verhaegen,et al.  Identification of the deterministic part of MIMO state space models given in innovations form from input-output data , 1994, Autom..

[8]  Izhak Bucher,et al.  Model updating via weighted reference basis with connectivity constraints , 2003 .

[9]  Guido De Roeck,et al.  REFERENCE-BASED STOCHASTIC SUBSPACE IDENTIFICATION FOR OUTPUT-ONLY MODAL ANALYSIS , 1999 .

[10]  Michael Link,et al.  UPDATING ANALYTICAL MODELS BY USING LOCAL AND GLOBAL PARAMETERS AND RELAXED OPTIMISATION REQUIREMENTS , 1998 .

[11]  Biswa Nath Datta,et al.  PARTIAL EIGENSTRUCTURE ASSIGNMENT FOR THE QUADRATIC PENCIL , 2000 .

[12]  M. Friswell,et al.  MODEL UPDATING USING ROBUST ESTIMATION , 2002 .

[13]  Kye-Si Kwon,et al.  Robust finite element model updating using Taguchi method , 2005 .

[14]  Suzanne Weaver Smith.  ITERATIVE MATRIX APPROXIMATION FOR MODEL UPDATING , 1998 .

[15]  K. F. Alvin,et al.  Finite Element Model Update via Bayesian Estimation and Minimization of Dynamic Residuals , 1996 .

[16]  Laurent Mevel,et al.  APPLICATION OF A SUBSPACE-BASED FAULT DETECTION METHOD TO INDUSTRIAL STRUCTURES , 1999 .

[17]  Åke Björck,et al.  Numerical methods for least square problems , 1996 .

[18]  Karolos M. Grigoriadis,et al.  Enhanced Structural Damage Detection Using Alternating Projection Methods , 1998 .

[19]  C. Fritzen,et al.  DAMAGE DETECTION BASED ON MODEL UPDATING METHODS , 1998 .

[20]  Charles R. Farrar,et al.  A summary review of vibration-based damage identification methods , 1998 .

[21]  Yoram Halevi,et al.  MODEL UPDATING IN STRUCTURAL DYNAMICS: A GENERALISED REFERENCE BASIS APPROACH , 1998 .