Modal criteria for optimization of structures through active structural acoustic control

Sébastien Besset (1) , Louis Jezequel (1)

1 LTDS - Laboratoire de Tribologie et Dynamique des Systèmes

This paper deals with modal criteria allowing optimization of structures through active structural acoustic control (ASAC) based on the independent modal strategy control (IMSC). The aim of the paper is to propose efficient criteria allowing to process optimization of structures by determining the most important modes to control considering only the location of the excitation on the structure. A generalized modal synthesis is used to study the coupled fluid-structure system. Modal criteria are proposed in order to determine the best choice for the controlled modes used in IMSC method. The way the ASAC will be applied is not discussed in the paper. Numerical simulations are computed to show the efficiency of the method, considering a simple vibroacoustic structure.

Mots clés: modal synthesis; active control; vibroacoustic coupling

Domaines: Mécanique des structures [physics.class-ph]; Mécanique des structures [physics.class-ph]; Vibrations [physics.class-ph]; Vibrations [physics.class-ph]; Acoustique [physics.class-ph]; Acoustique [physics.class-ph]

Sébastien Besset, Louis Jezequel. Modal criteria for optimization of structures through active structural acoustic control. International Journal for Numerical Methods in Engineering, 2010, 82 (12), pp.1560-1573. ⟨10.1002/nme.2817⟩. ⟨hal-00625135⟩