Passive damping wedge

申请公布号：US5823467(A)

申请号：US19970831532

申请日期：1997.04.01

申请公布日期：1998.10.20

申请人：

MCDONNELL DOUGLAS CORP

发明人：MATHUR, GOPAL P.

分类号：B64C1/12;B64C1/40;(IPC1-7):B64C1/12

主分类号：B64C1/12

摘要：The passive damping wedge for reducing sound radiation from reinforced structures excited by fluid flow over the outer surface of the structure. The damping wedge is generally attached at the trailing edge of the skin structure on the inner surface. The unique three-dimensional design of the damping wedge provides increased damping which absorbs vibrational energy in the structure. The wedge is made of viscoelastic material with a high damping capacity to maximize the ability to reflect vibrations within. The wedge generally has an elongated base which extends upwards from a flat lower surface. An upper surface tapers downwards from the base into a plurality of spaced apart front end members which extend away from the base. The wedge also has a plurality of pairs of sides, with each pair of sides tapering inwardly to generally define each of the front end members.

(ORTHOPAEDIC) ARTICLES COMPRISING CURABLE AND CROSSLINKABLE RESIN IMPREGNATED SHEET(S) CONTAINING LUBRICANT FOR REDUCED SURFACE TACK AFTER ACTIVATION IN WATER

AQUEOUS POLYMER EMULSION COMPRISING AN INTERPENETRATING POLYMER NETWORK; PREPARATION THEREOF AND FIBREFILL PRODUCT CONTAINING SUCH EMULSION AS BINDER

SIMPLE TYPE DATA CIPHERING SYSTEM

DIGOXIN ASSAY

REFRIGERATION CYCLE CONTROLLER

A SUSTAINED RELEASE PHARMACEUTICAL COMPOSITION CONTAINING SILICONE ELASTOMER AND AN ALBUMIN

STIMULATING CASHMERE FIBRE GROWTH ON CASHMERE-PRODUCING GOATS BY ADMINISTRATION OF MELATONIN

MODULAR TDM EQUIPMENT; INTERFACING MODULES ADDRESSED INDEPENDENTLY OF PHYSICAL LOCATION

PHARMACEUTICAL COMPOSITIONS CONTAINING TISSUE PLASMINOGEN ACTIVATOR

HETEROCYCLICALLY-CONDENSED DIPHENYLETHYLENE DERIVATIVES AND PESTICIDAL COMPOSITIONS

5-ARYLALKYL-4-ALKOXY-2(5H)-FURANONES AND PHARMACEUTICAL COMPOSITIONS

HETEROCYCLIC SUBSTITUTED-PHENOXYALKYL-ISOXAZOLES AND -FURANS AND PHARMACEUTICAL COMPOSITIONS

ALPHA-(AMINOALKYL)-ARYLACETIC ACID DERIVATIVES AND PHARMACEUTICAL COMPOSITIONS

1,2,3,4,6,7,12,12B-OCTAHYDRO(2,3-AQUINOLIZINE DERIVATIVES AND PHARMACEUTICAL COMPOSITIONS

ANCHOR RETRIEVING DEVICE

ROTARY ELECTROSTATIC SPRAYER

HEAT EXCHANGER WITH WEB PORTIONS FORMED INTEGRAL WITH AND CONNECTING DUCTING MEMBERS: WEBS ARRANGED SO THAT PLURALITY OF AREAS BETWEEN DUCTS ARE FREE OF WEB PORTIONS

SEALING COMPOUND HAVING INCREASED OIL RESISTANCE

RAIL MOVEMENT DETECTOR WITH SPLIT FIELD FILTER OPTICAL ELEMENT

PUSH-PULL DISPENSING CAP WITH SCRUBBER FOR CLEANING LIQUID CONTAINER