EXPERIMENTAL DETERMINATION OF THE EFFECT OF PROPELLER BLADE GEOMETRY ON MODAL DAMPING FACTORS

Authors
  1. Booton, M.
Corporate Authors
Memorial Univ of Newfoundland, St John's NFLD (CAN) Faculty of Engineering;Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
In order to assess the effect of propeller blade geometry on modal damping factors and resonant frequencies, sixteen flat plate models having varying skew angles and aspect ratios were tested using three methods: random excitation, sweep-sine and impact. Experimentally determined resonant frequencies were compared with those calculated from the finite element program "VAST". Damping ratios obtained from random excitation tests were found to contain discrepancies because of problems associated with measurement and analysis errors. Consequently, it was not possible to detect any significant trends with respect to the effect of geometry on modal damping ratios.
Date of publication
15 Mar 1984
Number of Pages
127
DSTKIM No
84-02927
CANDIS No
122224
Format(s):
Microfiche filmed at DSIS;Originator's fiche received by DSIS;Hardcopy

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