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An investigation of gear mesh failure prediction techniques. m.s. thesis - cleveland state univ.
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Zakrajsek, James J. |
| Copyright Year | 1989 |
| Description | A study was performed in which several gear failure prediction methods were investigated and applied to experimental data from a gear fatigue test apparatus. The primary objective was to provide a baseline understanding of the prediction methods and to evaluate their diagnostic capabilities. The methods investigated use the signal average in both the time and frequency domain to detect gear failure. Data from eleven gear fatigue tests were recorded at periodic time intervals as the gears were run from initiation to failure. Four major failure modes, consisting of heavy wear, tooth breakage, single pits, and distributed pitting were observed among the failed gears. Results show that the prediction methods were able to detect only those gear failures which involved heavy wear or distributed pitting. None of the methods could predict fatigue cracks, which resulted in tooth breakage, or single pits. It is suspected that the fatigue cracks were not detected because of limitations in data acquisition rather than in methodology. Additionally, the frequency response between the gear shaft and the transducer was found to significantly affect the vibration signal. The specific frequencies affected were filtered out of the signal average prior to application of the methods. |
| File Size | 3514139 |
| Page Count | 102 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19900004469 |
| Archival Resource Key | ark:/13960/t84j5d844 |
| Language | English |
| Publisher Date | 1989-11-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Fatigue Tests Pitting Gears Gear Teeth Wear Failure Analysis Fatigue Materials Failure Modes Performance Prediction Signal Processing Applications Programs Computers Crack Propagation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Thesis |
