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)


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    Title :

    An approach for estimating vibration characteristics of nonuniform rotor blades


    Additional title:

    Methode zur Abschaetzung des Schwingungsverhalten von ungleichfoermig gestalteten Laufschaufeln


    Contributors:

    Published in:

    AIAA Journal ; 17 , 9 ; 995-1002


    Publication date :

    1979


    Size :

    8 Seiten, 3 Bilder, 6 Tabellen, 25 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English






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