Accession Number : ADA290346

Title :   Influence of Gear Design Parameters on Gearbox Radiated Noise.

Descriptive Note : Technical memo,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CEN TER

Personal Author(s) : Oswald, Fred B. ; Townsend, Denniss P. ; Valco, Mark J. ; Spencer, Robert H. ; Drago, Raymond J.

PDF Url : ADA290346

Report Date : 09 SEP 1994

Pagination or Media Count : 8

Abstract : Spur and helical gears were tested in the NASA gear-noise rig to compare the noise produced by different gear designs. Sound power measurements were performed under controlled conditions for a matrix of operating conditions. Sound power was computed from near-field acoustic intensity scans taken just above the top surface of the gearbox. Test gears included four spur and five helical gear designs. The gears were designed to be as nearly identical as possible except for deliberate differences in tooth geometry and contact ratio. Test results are presented as a function of the gear design and operating conditions in the form of sound power charts and as narrow-band spectra. (AN)

Descriptors :   *GEARS, *RADIATED NOISE, *GEAR NOISE, TEST AND EVALUATION, VIBRATION, EXPERIMENTAL DATA, PARAMETERS, LOADS(FORCES), COMPARISON, SIGNAL TO NOISE RATIO, INTENSITY, HELICOPTERS, ACOUSTIC SIGNALS, POWER, NOISE REDUCTION, DESIGN CRITERIA, SOUND PRESSURE, NEAR FIELD, TRANSMISSION GEARS, TORQUE, NARROWBAND, GEAR TEETH.

Subject Categories : Machinery and Tools
      Acoustics
      Acoustics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE