An improved method to determine vibration damping of materials and structural componentsThe present, improved frequency-domain technique for vibration-damping estimation involves the fitting of a 'best curve' for the measured frequency-response data near a resonance by means of a least-squares error criterion. The damping ratio and the undamped natural frequency are then computed using the coefficients of the rational fraction polynomial that had been determined on the basis of the curve-fitting technique. Attention is given to the results of this method's application to damping measurements for graphite-reinforced epoxy composites. The results obtained are superior to those of the 'half-power points' method.
Document ID
19920063310
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Rao, Mohan D. (Michigan Technological University Houghton, United States)
Crocker, Malcolm J. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Zhu, G. H. (Auburn University AL, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
Structural Mechanics
Meeting Information
Meeting: International Congress on Recent Developments in Air and Structure-Borne Sound and Vibration