An investigation is carried out on alternative periodic designs of sandwich panels, for vibroacoustic purposes; a mechanically-linked double-wall panel and a rectangular core sandwich panel are considered. The elastic bending waves’ propagation versus the acoustic wavenumbers is trimmed using folded and corrugated core walls, trying to keep the same mass and compression stiffness of the original configurations. Standard and proposed configurations are 3D-printed and the sound transmission loss measurements carried out. The experimental evidence of reduced acoustic radiation of the panels, in a large frequency band, is achieved with measurements on the printed solutions.

EXPERIMENTAL INVESTIGATION OF REDUCED SOUND TRANSMISSION OF SANDWICH PANELS USING 3D-PRINTED MODELS

F. Franco;S. De Rosa;G. Petrone;
2020

Abstract

An investigation is carried out on alternative periodic designs of sandwich panels, for vibroacoustic purposes; a mechanically-linked double-wall panel and a rectangular core sandwich panel are considered. The elastic bending waves’ propagation versus the acoustic wavenumbers is trimmed using folded and corrugated core walls, trying to keep the same mass and compression stiffness of the original configurations. Standard and proposed configurations are 3D-printed and the sound transmission loss measurements carried out. The experimental evidence of reduced acoustic radiation of the panels, in a large frequency band, is achieved with measurements on the printed solutions.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/867059
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