This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Mal, A. Articles by Shih, F. Search for Related Content Social Bookmarking                         What's this?

A Conceptual Structural Health Monitoring System based on Vibration and Wave Propagation

Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, CA-90095-1597, USA, ajit{at}ucla.edu

Fabrizio Ricci

Department of Aeronautical Engineering, University of Naples Federico II, Via Claudio 21, 80125 Naples, Italy

Sauvik Banerjee

Department of Mechanical and Aerospace Engineering, University of California, Los Angeles, CA-90095-1597, USA

Frank Shih

Department of Mechanical Engineering, Seattle University, 900 Broadway, Seattle, WA 98122-4228, USA

Development of efficient methodologies to determine the presence, location, and severity of hidden damage in critical structural components is an important task in the design and construction of structural health monitoring systems in aging as well as new structures. In this article, a methodology for automatic damage identification and localization is presented. The structure is assumed to be instrumented with an array of actuators and sensors to excite and record its dynamic response, including vibration and wave propagation effects. In the vibrational approach, the data consist of the modal response of the structure produced by the actuators while in the wave propagation approach, they are the broadband signals due to ultrasonic waves propagating in the structures. Both types of signals are affected by the presence of defects. The approximate location and severity of an unknown defect is determined using a damage correlation index calculated from the frequency response function (FRF) of the structure. The damage index is a relative measure whose value depends on the differences in the dynamical properties of the undamaged (baseline) and damaged structures. The method is applied to simple structural components involving aluminum beams and plates with reduced local stiffness and a composite plate with impact damage. The potential application of the technique to practical health monitoring problems is discussed.

Key Words: structural health monitoring • hidden defect • damage index • frequency response • ultrasonic wave • aluminum • composite laminate

Structural Health Monitoring, Vol. 4, No. 3, 283-293 (2005)
DOI: 10.1177/1475921705055254


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?

This article has been cited by other articles:

				S. Banerjee, F. Ricci, E. Monaco, L. Lecce, and A. Mal Autonomous Impact Damage Monitoring in a Stiffened Composite Panel Journal of Intelligent Material Systems and Structures, June 1, 2007; 18(6): 623 - 633. [Abstract] [PDF]