Static structures (e.g. – buildings) – Machine or implement
Patent
1996-06-12
1998-07-07
Kent, Christopher
Static structures (e.g., buildings)
Machine or implement
521676, 521678, 527291, 527381, 5274213, 5274519, E04C 346, E04B 198, E04H 902
Patent
active
057750491
ABSTRACT:
The damped structural member includes a structural member and granular material in intimate contact with the member. In one embodiment the granular material is lightweight and has a bulk specific gravity of less than 1.5. When low weight is important, the granular material has a bulk specific gravity of less than or equal to one. The particles of the granular material are also in intimate contact with one another. The granular material may be substantially non-viscoelastic. Preferred granular material is low density polyethylene and glass microspheres. The granular material fills hollow structural members or is placed into intimate contact with open structural members. The lightweight fill effectively damps vibrational modes without excessively increasing the weight of the structural member.
REFERENCES:
patent: 4019301 (1977-04-01), Fox
patent: 4453887 (1984-06-01), Schucker
patent: 4566231 (1986-01-01), Konsevich
patent: 5016602 (1991-05-01), Mizek
patent: 5020644 (1991-06-01), Novoa
patent: 5197707 (1993-03-01), Kohan
patent: 5327733 (1994-07-01), Boolchand et al.
patent: 5345177 (1994-09-01), Sato et al.
patent: 5400296 (1995-03-01), Cushman et al.
"Damping Hollow Tubular Structures with `Lightweight` Viscoelastic Spheres," House, Proceedings of the ACS Division of Polymeric Materials: Science and Engineering 60, Dallas, Texas (Spring 1989).
"The Effective Elastic Moduli of a Randon Packing of Spheres," Walton, J. Mech. Phys. Solids 35(2), 213-226 (1987).
"Truss Research, M.I.T. Department of Ocean Engineering," Review Meeting CDNSWC, Cambridge, MA (Mar. 16, 1994).
"M.I.T. Bead Damping Experiments" (Jun. 15, 1994).
"ARPA/ONR Damping of Lightweight Structures" (Jun. 5, 1994).
"Experimental Effort: Structural Acoustics & Hydroacoustics Research Branch," Warwick (Jun. 15, 1994).
"An Evaluation of Polyethylene Beads as a Damping Treatment for Tubular Truss Structures," Warwick et al., Carderock Division Naval Surface Warfare Center, Bethesda, Maryland (Oct. 1994).
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