Abstract
The output error and equation error methods of system identification are compared for their effectiveness in assessing damage in structural systems. Damage is modeled on an element-by-element basis as changes in sectional properties, which then contribute to variations in the terms of the structural stiffness matrix. Both static displacements and eigenmodes of the structure are used in the damage detection process. A rational basis for the proper selection of eigenmodes and loading conditions for the identification process is also presented. Characteristics of the unconstrained optimization design space for the two approaches are discussed in context of their ability to yield the location and extent of damage.
Similar content being viewed by others
References
Baruch, M. 1982: Optimal correction of mass and stiffness matrices using measured modes.AIAA J. 20, 1623–1626
Berman, A.; Nagy, E.J. 1983: Improvement of a large analytical model using test data.AIAA J. 21, 1168–1173
Chen, J.C.; Garba, J.A. 1987: On orbit damage assessment for large space structures.Proc. 28th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conf. (held in Monterey, California)
Hajela, P.; Soeiro, F.J. 1989: Structural damage detection based on static and modal analysis.Proc. 30th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conf. (held in Mobile, Alabama)
Hanagud, S.; Meyyappa, M.; Craig, J.I. 1987: Identification of structural dynamic system. In: Hajela, P. (ed.)Recent trends in aeroelasticity and structural dynamics, pp 120–141. Gainesville: University Presses of Florida
Kabe, A.M. 1985: Stiffness matrix adjustment using mode data.AIAA J. 23, 1431–1436
Smith, S.W.; Hendricks, S.L. 1987: Evaluation of two identification methods for damage detection in large space structures.Proc. 6th VPI & SU/AIAA Symp. on Dynamics and Control of Large Structures (held in Blacksburg, Virginia)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Hajela, P., Soeiro, F.J. Recent developments in damage detection based on system identification methods. Structural Optimization 2, 1–10 (1990). https://doi.org/10.1007/BF01743515
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01743515