Title: Selective elasto-acoustic modal synthesis by orthogonality criteria applied to vehicle structures

Authors: J.M. Shippen, J.W. Dunn

Addresses: Automotive Engineering Centre, The University of Birmingham, UK. ' Automotive Engineering Centre, The University of Birmingham, UK

Abstract: This paper describes a method for quantitatively ranking the influence of structural modes on the behaviour of a coupled structural/acoustic system. Using this ranking information, a selective structural modal elimination exercise can be undertaken to reduce the model storage requirements and reduce analysis costs. The technique has been proven to be mathematically correct on a simple model and then applied to a vehicle structure, which was correlated to experimental results.

Keywords: acoustic modally deficient models; finite element analysis; FEA; modal orthogonality; vehicle noise; acoustic analysis; elasto-acoustic modal synthesis; vehicle design; vehicle structures; vehicle design.

DOI: 10.1504/IJVD.1991.061681

International Journal of Vehicle Design, 1991 Vol.12 No.2, pp.208 - 216

Published online: 27 May 2014 *

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