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Article Dans Une Revue Journal of Sound and Vibration Année : 2024

A global decoupling technique for subtractive modelling on acoustic and vibration problems

Résumé

The reverse Condensed Transfer Function (rCTF) method is a substructuring approach based on the concept of condensed mechanical receptance and acoustical impedance. Its objective is to predict the vibroacoustic response of a subsystem which was initially part of a global system, from information taken from the global system and the subtracted subsystem which must be removed. This paper proposes an extended formulation to improve the convergence of the rCTF method for subtractive modelling. The fundamentals of the rCTF method have been proposed recently considering only the decoupling interface between the global system and the subtracted subsystem. This approach of decoupling, called the local approach, exhibits some numerical issues. In order to circumvent them, the decoupling interface is extended in this study to account for a second interface, internal to the subtracted subsystem. The numerical performances of this extension, called the global approach, are firstly studied on an academic rod decoupling case which allows parametric studies. Then, a comparison between the local and global approaches is proposed for the scattering problem of an acoustic plane wave by a rigid sphere in an infinite water medium.
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Dates et versions

hal-04192792 , version 1 (31-08-2023)

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F. Dumortier, V. Meyer, Laurent Maxit. A global decoupling technique for subtractive modelling on acoustic and vibration problems. Journal of Sound and Vibration, 2024, 569, pp.117969. ⟨10.1016/j.jsv.2023.117969⟩. ⟨hal-04192792⟩
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