Prediction of Gear-Mesh-Induced High-Frequency Vibration Spectra in Geared Power Trains

Abstract

Characteristics of vibration spectra induced by gear meshes in both single gear reductions and planetary gear reductions were investigated. Methods were developed to analyze the planet-pass induced vibrations which exist in normal planetary gear reduction systems. It was found that the planet-pass vibration sideband frequencies occur both below and above the base signal at integer multiples of planet-pass frequency and that the sideband amplitudes may exceed that of the base signal. The effect of planet pair phasing on the vibration sideband spectra was determined for the CH-47 helicopter forward rotor drive transmission first-stage planetary reduction. A computer-implemented analysis was established for predicting vibration sidebands produced by variations in centerline distance, tooth transmitted force, and tooth support discontinuities for single gear mesh systems.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1974
Accession Number
AD0777496

Entities

People

  • Alston L. Gu
  • Robert H. Badgley

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Computer Programs
  • Computers
  • Contracts
  • Dynamic Loads
  • Engineering
  • Fourier Analysis
  • Frequency
  • Gear Teeth
  • Gears
  • Helicopters
  • Identification
  • Manufacturing
  • Materials
  • Measurement
  • Noise Reduction
  • Planetary Gears
  • Spiral Bevel Gears

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).