Title: Combined experimental-numerical characterisation of the vibro-acoustic properties of lightweight panels
Authors: Jonckheere, Stijn ×
Vivolo, Marianna
Pluymers, Bert
Vandepitte, Dirk
Desmet, Wim #
Issue Date: May-2012
Host Document: Proceedings of the 9th National Conference on Theoretical and Applied Mechanics (NCTAM 2012)
Conference: National Conference on Theoretical and Applied Mechanics (NCTAM 2012) edition:9 location:Brussels date:9-10 May 2012
Abstract: The presented paper focuses on a combined approach, using a new type of measurement setup, which has been specifically developed for examining the vibro-acoustic behaviour of lightweight panels and the Wave Based Method (WBM) for the numerical simulation of vibro-acoustic problems.
The setup consists of a concrete cavity of 0.83 m³ which can host test specimens of variable size and thickness. It allows for both structural and acoustical excitation and measurement acquisition. Among others, the vibro-acoustic Insertion Loss (IL) of a test sample can be measured over a wide frequency range, accounting for the acoustic cavity modal behaviour, which is realistic in many real-life applications. The WBM, a novel technique for steady-state vibro-acoustic simulation, is adopted for efficient virtual characterisation of the considered setup. The WBM has a superior convergence behaviour as compared to state of the use techniques such as the Finite Element Method, given a low geometrical complexity of the problem, which is the case for the test box at hand. This increased convergence rate makes the technique applicable for a broader frequency range.
The combination of the versatility of this test setup and the efficiency of the Wave Based Method (WBM) shows promising results for the characterisation of materials.
Publication status: accepted
KU Leuven publication type: AC
Appears in Collections:Production Engineering, Machine Design and Automation (PMA) Section
× corresponding author
# (joint) last author

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