Method and apparatus for vibration damping structural elements.

摘要: This invention relates to vibration damping and, more particularly, reducing the noise produced by, and increase sonic fatique life of, structural elements. A method apparatus for elements, wherein a rigid constraining layer (27) is viscoelastically attached (29) at least two transverse (normally orthogonal) legs (23, 25a, 25b) of undamped element (21) be damped. The viscoelastic attachment vibrating leg directly damps vibrations leg. In addition, couples other As result, provides indirect damping. That is, when one vibrates, damped in ways. First, material attaching direct Secondly, leg, which Depending upon magnitude encountered by element, can segmented (Figures 4 5) or extend along entire length straight curved. If segmented, segments connected together links (48a-48d), may form part layer. Also, elements (57a, 57b) layers (59a, 59b), on either side included. Further, element(s) include apertures (Fig. allow structure, brackets like element. While was conceived use cabin an aircraft, it understood that used all types transporation vehicles.