Abstract
AbstractThis work is supplementary to extending the use of digital image correlation (DIC) to the experimental method of traveling wave excitation (TWE). The current state of the art for measuring the modal response of a component using TWE is with scanning laser vibrometry (SLV). Although SLV is highly accurate, only one point may be measured during a frequency sweep, therefore potentially causing excessively long experimental testing time when measuring the full-field modal response of a component. The replacement of SLV with DIC has the ability to significantly reduce the time to conduct TWE tests as DIC is capable of measuring full-field data during one sweep when compared to SLV which requires one sweep for often many key points on the component identified by the user. Within this work, DIC measurements are compared and validated against SLV for the measurement of the model response of an academic finger disk undergoing frequency sweeps via single point excitation.KeywordsDigital image correlationScanning laser vibrometryOptical strain measurementsModal testingIntegrally bladed rotor
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