Techno Press
Techno Press

Structural Engineering and Mechanics   Volume 8, Number 2, August 1999, pages 181-191
DOI: http://dx.doi.org/10.12989/sem.1999.8.2.181
 
Mode localization and frequency loci veering in an aircraft with external stores
Liu JK, Chan HC

 
Abstract     [Full Text]
    This paper presents an investigation of the mode localization and frequency loci veering phenomena in an aircraft with disordered external stores. Two theoretical analyses are carried out to study the occurring mechanism of the two phenomena: condensation technique in the subspace spanned by modes of interest and geometric mapping theory in the complex plane. Two simple criteria for predicting the occurrence of the mode localization and frequency loci veering are put forward. The prediction of the phenomena by our theoretically proposed criteria is in good agreement with that obtained through numerical calculations of characteristic solutions of the disordered system.
 
Key Words
    structural dynamics, aircraft, external stores, disorder, mode localization, frequency loci veering, geometric theory, complex plane mapping, condensation, subspace, eigenvalue problem
 
Address
Liu JK, Zhongshan Univ, Dept Mech, Guangzhou, Peoples R China
Zhongshan Univ, Dept Mech, Guangzhou, Peoples R China
Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong
 

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