Examination Of Pump Cavitation, Gear Mesh And Blade Performance Using External Vibration Characteristics
Whereas the interpretation of the low frequency vibration characteristics generated by operating machinery is relatively well understood, the use of the high frequencies, sonic and above, to predict conditions such as blade and gear tooth performance is in its infancy. With the vast amount of data available the basic problem becomes one of identifying, correlating and isolating individual characteristics so that small changes can be recognized in sufficient time to take corrective action. Demodulation followed by spectrum analysis as well as spectrum analysis by itself are two data reduction techniques discussed. The former provides a convenient way of examining individual events occurring in rapid repetitive succession such as gear tooth engagement. Observations concerning harmonic patterns are similarly discussed along with some presume physical generating mechanisms.
Mitchell, John S. (1975). Examination Of Pump Cavitation, Gear Mesh And Blade Performance Using External Vibration Characteristics. Texas A&M University. Gas Turbine Laboratories. Available electronically from