A method is presented for determining the vibration characteristics of a rotating blade whose cross-sectional dimensions or mechanical properties may vary sharply or even discontinuously along its length. The coupled flapwise bending, chordwise bending, and torsional vibration of the blade is analyzed by the method of the new quotient which is based on a variational statement proposed by Nemat-Nasser. In this approach, the nonuniform blade properties may be approximated by step (piecewise constant) functions. Two illustrative examples are given, and the results are compared with available experimental data and other numerical solutions. The comparison shows that the method of the new quotient yields very good results. (Jensen)
An approach for estimating vibration characteristics of nonuniform rotor blades
Methode zur Abschaetzung des Schwingungsverhalten von ungleichfoermig gestalteten Laufschaufeln
AIAA Journal ; 17 , 9 ; 995-1002
1979
8 Seiten, 3 Bilder, 6 Tabellen, 25 Quellen
Article (Journal)
English
Dynamic Response of Nonuniform Rotor Blades
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