Structural Surface Intensity as a Diagnostic Indicator of Machinery Failure

摘要

Many time and frequency based analysis techniques are available to predict mechanical faults. The primary function of these techniuqes is to evaluate wear that effects machinery reliability and to predict subsequent failure. The focus of this research is to develop a metric that is more responsive to the mechanical condition of a structure than existing vibration analysis methods. Structural surface intensity is a quantity that indicates vibrational energy flow through a structure. Evaluating the energy level and its direction could possibly lead to a sensitive and effective indicator of mechanical condition. Since this technique has had limited use as an applied method of fault analysis, structural intensity measurements have been made on a gearbox casing in the ARL Penn State Machinery Diagnostic Test Bed (MDTB) as the gear set is run to failure.