• Beck, Benjamin S.
• Cunefare, Kenneth A.
• Romero, Francisco Mariano Badea

Abstract

<jats:p>Many industries are implementing the use of thin, lightweight carbon fiber panels to increase stiffness and decrease weight. Yet, vibrations of the panels can reach large amplitudes causing an increased acoustic noise field. The use of piezoelectric actuators bonded on or within the composite panels can be used to decrease the vibration. Negative capacitance shunts have been shown to decrease flexural vibrations over a broadband frequency range. By using the negative capacitance shunts connected to piezoelectric patches, the noise field can be reduced. Yet, the effect of the control may also cause increased acoustic coupling causing more of the flexural modes to create propagating acoustic waves. The acoustic effects of the control system on a clamped carbon fiber composite panel are analyzed by investigating the flexural amplitude and wave number decomposition. The results of the numerical model of the panel are experimentally validated.</jats:p>

Topics

• Carbon
• composite
• decomposition