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Beitrag zur Berechnung des linearen und nichtlinearen Verhaltens von lagerlosen Rotorblättern mit beliebig verteilten Blatteigenschaften

Ein einfaches Berechnungsverfahren
Contribution to the calculation of the linear and non-linear behaviour of hingeless rotor blades with uneven blade properties - a simple calculation tool
 
: Büter, A.; Nitzsche, F.

VDI-Gesellschaft Entwicklung, Konstruktion, Vertrieb -EKV-:
VDI-Schwingungstagung 2004 : Modalanalyse und Identifikation; Verfahren und Anwendungen bei dynamischen Systemen; Tagung Wiesloch, 25. und 26. Mai 2004
Düsseldorf: VDI-Verlag, 2004 (VDI-Berichte 1825)
ISBN: 3-18-091825-X
pp.389-410
Schwingungstagung <2004, Wiesloch>
German
Conference Paper
Fraunhofer LBF ()
Rotorblatt

Abstract
This paper deals with a simple tool for the calculation of the linear and non-linear behaviour of hingeless rotor blades with uneven blade properties. The calculation bases on the Galerkin Method which was used for solution of the non-linear differential equations given by Hodges and Dowell [1] and aims for the fan diagram respectively rotor design. After a physical analysis of the coupled differential equations, the basics of the calculation tool are described. The calculation is divided into two steps: In step one the linear system of differential equations is solved by a numerical solver based on the Integration Matrix Method [2],[3],[4],[5]. The resulting static and dynamic deflections of the "linear" rotor blade are the inputs for the second part, in which the non-linear differential equations is then solved by the Galerkin Method. [11] The calculation tool is validated and here after valued with available databases for rotor blades and with solutions given by anal ytical calculations.

: http://publica.fraunhofer.de/documents/N-26246.html