Survey of Structural Reanalysis Techniques

by Jasbir S. Arora, Assoc. Prof.; Div. of Materials Engrg., Coll. of Engrg., Univ. of Iowa, Iowa City, Iowa,


Serial Information: Journal of the Structural Division, 1976, Vol. 102, Issue 4, Pg. 783-802


Document Type: Journal Paper

Abstract: The behavior of the structure is assumed to be described by a finite element model. Several techniques for computing static response of modified structures are available in literature. These are initial strain concept of reanalysis, techniques based on the Sherman-Morrison identity, some general techniques of structural modifications, Taylor series approach, iterative techniques, reduced basis methods, and some other techniques. Some new approaches based on the reduced basis method are tried and their results are summarized. For frequency response of modified structures three basically different techniques are available. In the first one, modifications to the eigenvalues and eigenvectors are computed directly by using Taylor series expansion. In the second one, locally modified systems are treated in an exact manner, and in the third technique component mode substitution methods are viewed as reanalysis methods.

Subject Headings: Structural behavior | Finite element method | Structural response | Structural models | Statics (mechanics) | Strain | Eigenvalues | Geomatic surveys

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