Experimental validation of the wave based prediction technique for the analysis of the coupled vibro-acoustic behaviour of a 3D cavity

© 2003 Elsevier Science Ltd. All rights reserved. This paper discusses a new numerical prediction technique for solving steady-state coupled vibro-acoustic problems. The technique is based on the indirect Trefftz method, in which the dynamic variables are expanded in terms of wave functions, which exactly satisfy the governing dynamic equations. It is illustrated through an experimental validation that the new technique provides a high prediction accuracy and that it does not suffer from numerical dispersion. Because of its fast convergence properties, the technique can be applied in a much larger frequency range than the traditional element based techniques.status: publishe