A finite element model for sound transmission through laminated composite plates

✍ Scribed by J.V. Ramakrishnan; L.R. Koval

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 603 KB
• Volume: 112
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1016/s0022-460x(87)80109-8

✦ Synopsis

The finite element method is used to model the noise transmission through unstittened and stiftened laminated composite panels of finite size into a closed cavity. Plate and acoustic finite elements are coupled and the frequencies of the coupled modes are determined. The model is then used to calculate the noise reduction of the panel. Results are compared to experimental values obtained at the NASA Langley Research Center. The purpose of this paper is to demonstrate the use of finite elements to model, for noise transmission calculations, complex structures, such as a stiffened composite panel or a composite panel with windows.