Title: A wave-based sub-structuring approach for fast vehicle body optimisation

Authors: Stijn Donders, Rabah Hadjit, Marc Brughmans, Luc Hermans, Wim Desmet

Addresses: LMS International, Interleuvenlaan 68, B-3001 Leuven, Belgium. ' LMS International, Interleuvenlaan 68, B-3001 Leuven, Belgium. ' LMS International, Interleuvenlaan 68, B-3001 Leuven, Belgium. ' LMS International, Interleuvenlaan 68, B-3001 Leuven, Belgium. ' Department of Mechanical Engineering, Division PMA, Catholic University of Leuven, Celestijnenlaan 300B, B-3001 Leuven, Belgium

Abstract: Conventional sub-structuring methods involve the coupling of substructure models through the common Degrees of Freedom (DOF). A wave-based sub-structuring approach is being developed, using a set of basis functions that describe the dynamic behaviour at the coupling interfaces. The interface DOFs are expanded in terms of these basis functions, typically reducing the size of the interface description and hence resulting in faster assembly predictions. Obtaining suitable basis functions is a critical step in the wave-based sub-structuring procedure. The procedure is first demonstrated on a two-plate assembly structure. The industrial applicability is then demonstrated on three real test cases from the automotive industry.

Keywords: component mode synthesis; modification; vehicle body optimisation; automotive NVH analysis; wave-based sub-structuring; vehicle design; noise; vibration; harshness.

DOI: 10.1504/IJVD.2007.012298

International Journal of Vehicle Design, 2007 Vol.43 No.1/2/3/4, pp.100 - 115

Published online: 04 Feb 2007 *

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