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