Comparison of analysis and experiment for gearbox noise

Fred B. Oswald, A. F. Seybert, T. W. Wu, William Atherton

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Low-contact-ratio spur gears were tested in the NASA gearnoise rig to study the noise radiated from the top of the gearbox. Experimental results were compared with a NASA acoustics code to validate the code for predicting transmission noise. The analytical code is based on the boundary element method (BEM) which models the gearbox top as a plate in an infinite baffle. Narrow-band vibration spectra measured at 63 nodes on the gearbox top were used to produce input data for the BEM model. The BEM code predicted the total sound power based on this measured vibration. The measured sound power was obtained from an acoustic intensity scan taken near the surface of the gearbox at the same 63 nodes used for vibration measurements. Analytical and experimental results were compared at four different speeds for sound power at each of the narrow-band frequencies over the range of 400 to 3200 Hz. Results are also compared for the sound power level at meshing frequency plus three sideband pairs and at selected gearbox resonant frequencies. The difference between predicted and measured sound power is typically less than 3 dB with the predicted value generally less than the measured value.

Original languageEnglish
Title of host publication6th International Power Transmission and Gearing Conference
Subtitle of host publicationAdvancing Power Transmission Into the 21st Century
Number of pages5
ISBN (Electronic)9780791809372
StatePublished - 1992
EventASME 1992 Design Technical Conferences, DETC 1992 - Scottsdale, United States
Duration: Sep 13 1992Sep 16 1992

Publication series

NameProceedings of the ASME Design Engineering Technical Conference
VolumePart F168016-1


ConferenceASME 1992 Design Technical Conferences, DETC 1992
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright:
© 1992 American Society of Mechanical Engineers (ASME). All rights reserved.

ASJC Scopus subject areas

  • Mechanical Engineering
  • Computer Graphics and Computer-Aided Design
  • Computer Science Applications
  • Modeling and Simulation


Dive into the research topics of 'Comparison of analysis and experiment for gearbox noise'. Together they form a unique fingerprint.

Cite this