Damage Detection in Periodic Structuresby Norris Stubbs, Texas A&M Univ, Dep of Civil, Engineering, College Station, TX, USA,
Roberto Osegueda, Texas A&M Univ, Dep of Civil, Engineering, College Station, TX, USA,
Abstract: Nondestructive damage detection in periodic structures using continuum analogues of the discrete structure is studied. Algebraic equations relating changes in eigenfrequencies to the fractional reductions in stiffnesses are derived. Methods of modelling periodic structures as continua are summarized and equations of damage are extended to continuous structural elements. Basic equations which predict the location and magnitude of damage in the periodic structure using the continuum results are summarized. The vibration approach is based on the fact that, for any structure, the natural modes of vibration depend only upon the characteristics of the structure.
Subject Headings: Damage (structural) | Structural analysis | Continuous structures | Vibration | Structural members | Stiffening | Structural models
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