New Structural Dynamic Condensation Method for Finite Element Models

A new iterative method is proposed for the reduction of finite element models arising in test-analysis correlation, model updating, finite element modeling, vibration control, structural dynamic optimization, and so on. Based on the modified eigenvalue equation and the eigenvalue shifting technique,...

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Bibliographic Details
Published in:AIAA journal 1998-07, Vol.36 (7), p.1320-1324
Main Authors: Qu, Zu-Qing, Fu, Zhi-Fang
Format: Article
Language:English
Subjects:
Aircraft
Applied sciences
Buildings. Public works
Computational techniques
Condensation
Exact sciences and technology
Finite element analysis
Finite-element and galerkin methods
Fundamental areas of phenomenology (including applications)
Mathematical methods in physics
Physics
Solid mechanics
Strength of materials (elasticity, plasticity, buckling, etc.)
Structural analysis. Stresses
Structural and continuum mechanics
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
Vibrations and mechanical waves
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Summary:A new iterative method is proposed for the reduction of finite element models arising in test-analysis correlation, model updating, finite element modeling, vibration control, structural dynamic optimization, and so on. Based on the modified eigenvalue equation and the eigenvalue shifting technique, two constraint equations for the dynamic condensation matrix, which relates the deformations associated with the master and stave degrees of freedom, are derived. Two iterative schemes an presented for solving the constraint equations.
ISSN:0001-1452
1533-385X
DOI:10.2514/2.517