Effect of fiber orientation on acoustic and vibration response of a carbon fiber/epoxy composite plate: Natural vibration mode and sound radiation

Aim of the paper is to find how the acoustic and vibration responses of rectangular carbon-fiber-reinforced plastic (CFRP) plates is changed by the various orientation of fiber in a CFRP plate. First, the vibration and acoustic response of the CFRP plate excited by a concentrated harmonic force along with the natural vibration were evaluated theoretically. The theoretical solutions were verified by comparing with numerical simulations, which were conducted using commercial software. Second in order to confirm the numerical solutions, the experimental works were performed with three CFRP plates having different fiber orientation of 0°, 45°, and 90°. Finally the influence of fiber orientation on vibration and acoustics was investigated in CFRP plates.