Modal Testing on Hip ProsthesisDeena Abou-TrabiMike GuthrieHunter MoorePhil CornwellModal Testing on Hip ProsthesisLos Alamos Dynamics Summer School2Modal Testing on Hip ProsthesisSetup ProceduresProblems EncounteredModal AnalysisRelevance to ProjectModal Testing on Hip ProsthesisLos Alamos Dynamics Summer School3The modal testing was completed under free-free conditionsImpact HammerAccelerometer 1Accelerometer 2Modal Testing on Hip ProsthesisLos Alamos Dynamics Summer School4The first attempt at modal testing did not provide expected resultsTrial 1Trial 2Modal Testing on Hip ProsthesisLos Alamos Dynamics Summer School5We encountered file and coordinate labeling problems during our testing• Labeled the file incorrectly• Improperly set coordinates in MEscopeMode shape in axial directionName(-1yR-2xE)Modal Testing on Hip ProsthesisLos Alamos Dynamics Summer School6The FRFs allowed for easy recognition of resonances.X-Direction Drive Point FRFY-Direction Drive Point FRFModal Testing on Hip ProsthesisLos Alamos Dynamics Summer School7Bending modes were the dominant low frequency modes of the prosthesis1stBending in Y @ 2.71 kHz 1st Bending in X @ 2.39 kHzModal Testing on Hip ProsthesisLos Alamos Dynamics Summer School82nd Bending in Y @ 6.48 kHz 2nd Bending in X @ 6.64 kHzBending modes were the dominant low frequency modes of the prosthesisModal Testing on Hip ProsthesisLos Alamos Dynamics Summer School9Higher Frequency Modes Look SimilarMode @ 16.8 kHz Mode @ 17.7 kHzModal Testing on Hip ProsthesisLos Alamos Dynamics Summer School10The frequencies discovered during modal testing carry more relevance than the mode shapesModal Testing on Hip ProsthesisLos Alamos Dynamics Summer School11The modal testing and analysis provided valuable
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