The Reduction of Resonant Vibrations in Integrally Stiffened Skin- Stringer Panels Using Visco-Elastic Materials
Abstract
The vibration characteristics of integrally stiffened skin-stringer panels have been investigated theoretically and experimentally. This type of structure was found to have mode shapes similar to those of flat plates due to the relatively low values of stringer bending stiffness. The experimental measurements were made by means of strain gauges and accelerometers, with the typical panel excited acoustically by travelling waves at approximately grazing incidence. Methods of damping the resonant vibrations were also investigated theoretically and experimentally. Predictions were verified using a beam taken from the cross section of an integrally stiffened panel. It was found that an extremely efficient method was one in which a damper was attached to the free edges of the stringers. This damper could be either a strip of viscoelastic material or a shear system made up of metal skins and a viscoelastic shear layer.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1971
- Accession Number
- AD0727773
Entities
People
- Fernando Cicci
Organizations
- University of Southampton