Beam dampers for damping the vibrations of the skin of reinforce

Details Beam dampers for damping the vibrations of the skin of reinforce Beam dampers for damping the vibrations of the skin of reinforce

1981-12-14

1984-01-17

Fuller, Benjamin R.

Acoustics

Sound-modifying means

Mechanical vibration attenuator

181290, 181294, 244119, 428120, 52403, 52806, F16F 1500

Patent

active

044259808

ABSTRACT:
Beam dampers comprising a stiff, lightweight, elongate beam and layer of viscoelastic material located along an attachment flange of the beam are disclosed. The flanges of the beam is attached by the layer of viscoelastic material to the skin of a structure whose skin vibrations are to be damped. While a beam having a cross-sectional I-shape is preferred, other cross-sectional shapes can be used, such as L, Z, U and T-shapes. Regardless of their shapes, the beam acts as a constraining element for the viscoelastic attachment layer. The beam is oriented such that it is stiff in a plane transverse to the plane of the skin, resulting in thickness deformation of the layer of viscoelastic material (rather than shear deformation) converting vibration energy into heat.

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