Transmission-error frequency-domain-behavior of failing gears

William D. Mark, Aaron C. Isaacson, Matthew E. Wagner

Research output: Contribution to journalArticle

Abstract

Failing gear teeth, either by working-surface-damage (pitting, spalling, scuffing, etc.) or by bending fatigue, causes tooth-to-tooth variations in the loaded tooth working surfaces. Such variations cause changes (generally increases) in the non-tooth-meshing rotational-harmonic amplitudes of the transmission-error contribution from the affected gear. Simple models of missing working-surface material caused by damage are used to show where transmission-error rotational-harmonic spectrum changes will take place. Bending fatigue damage is shown to initially cause maximum changes in rotational-harmonic amplitudes well below the tooth-meshing fundamental harmonic, whereas small pits are shown to cause changes in higher-frequency rotational-harmonic amplitudes. Good agreement is shown between an experimentally obtained rotational-harmonic spectrum caused by tooth-surface damage and that predicted from damage measured on the failing teeth. Substantial increases in high-frequency rotational-harmonic amplitudes are shown to be expected from gear teeth undergoing significant plastic deformation in late stages of bending-fatigue failure. Accurate assessment of damage contributions using before-damage non-negligible rotational-harmonic amplitudes (sideband harmonics, etc.) are shown to suggest use of complex rotational-harmonic amplitudes.

Original languageEnglish (US)
Pages (from-to)102-119
Number of pages18
JournalMechanical Systems and Signal Processing
Volume115
DOIs
StatePublished - Jan 15 2019

Fingerprint

Gears
Gear teeth
Fatigue of materials
Bending (deformation)
Spalling
Fatigue damage
Pitting
Plastic deformation

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Signal Processing
  • Civil and Structural Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Computer Science Applications

Cite this

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Transmission-error frequency-domain-behavior of failing gears. / Mark, William D.; Isaacson, Aaron C.; Wagner, Matthew E.

In: Mechanical Systems and Signal Processing, Vol. 115, 15.01.2019, p. 102-119.

Research output: Contribution to journalArticle

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