Thermal effects on the sound transmission through aerospace composite structures

Authors: D. Chronopoulos, M. Ichchou, B. Troclet, O. Bareille

Abstract:
The temperature dependent material characteristics of a layered panel are experimentally measured using a Thermal Mechanical Analysis (TMA) configuration. The temperature dependent wave dispersion characteristics of the panel are subsequently computed using a Wave Finite Element Method (WFEM). The results are experimentally validated by measurements on the dynamic response of the structure for various temperatures. The WFEM predictions are eventually used within a wave-context SEA approach in order to calculate the temperature dependent Sound Transmission Loss (STL) of the layered panel. Results on the STL for temperatures varying between −100 ◦C to 160 ◦C are computed for a structure operating at sea level. The importance of the glass transition region on the panel’s vibroacoustic response is exhibited and discussed. The acoustic transparency of a composite structure operating at higher altitudes is also discussed.

Keywords:
Composite structures
Temperature effects
Statistical Energy Analysis
Acoustic transparency

Published in: Aerospace Science and Technology  (Volumes 30, issue 1, October 2013)

Publisher: Elsevier

ISSN Information: 1270-9638

Thermal effects on the sound transmission through aerospace composite structures

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