Accession Number : ADD013671

Title :   Structural Damper for Eliminating Wind Induced Vibrations.

Descriptive Note : Filed 1 Oct 80, patented 21 Sep 82,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Buckley, William H

Report Date : 02 Sep 1982

Pagination or Media Count : 6

Abstract : This invention generally relates to vibration damping means and more particularly to damping mechanisms for reducing wind induced oscillations and vibrations of tall, slender structures such as lightpoles, flagpoles, antennas and the like. A damping assembly for reducing wind-induced vibrations in elongated structures comprises a plurality of damping tubes suspended within the structure in end-to-end relationship so that the end portions of the damping tubes are disposed in abutting relationship with the inner surface of the structure. Each damping tube includes an elongated shell, vibration damping material such as sand filling the shell, and plug elements sealing the end portions of the shell. Rod elements are secured to the plugs to interconnect the damping tubes. In an alternative arrangement spacer elements are connected to the rods so that the damping tubes are supported at their end portions in an aligned relationship.

Descriptors :   *DAMPING, *PATENTS, *STRUCTURAL PROPERTIES, *VIBRATION, *WIND, ANTENNAS, ASSEMBLY, FILLING, INTERNAL, MATERIALS, OSCILLATION, PLUGS, RODS, SAND, SEALING COMPOUNDS, SLENDER BODIES, SPACERS, STRUCTURES, SURFACES, TUBES

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE