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Structural Analysis and Optimization of a Propfan Blade by Use of the Finite Element Method.

Lammering, R. (1990) Structural Analysis and Optimization of a Propfan Blade by Use of the Finite Element Method. In: ESA-TT-1216, November 1990.Uebersetzung des DLR-FB 90-01..

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Abstract

Structural analysis of advanced propellers (propfans) is only possible by use of numerical methods because, due to the geometry and the loading, a geometrically non-linear calculation is required. Algorithms applicable to the finite-element-method are presented and employed in the calculation of a propfan-blade. This blade is discretized as a shallow shell. The constitutive equations for isotropic and for layered material are implemented into the formulation of the finite elements. The quasistatic deformations resulting from centrifugal forces as well as the eigenmodes and eigenfrequencies (as a function rotational speed) are presented. For a propfan-blade of composite material with 6 layers of equal thickness the methods of mathematical optimization are used to minimize the displacement at the tip of the balde, using the fiber orientation as design variables. In a second calculation, the twisting of the blade is minimized. It is shown that the deformation behaviour can greatly be influenced by the fiber orientation.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1990, pages=68,
Title:Structural Analysis and Optimization of a Propfan Blade by Use of the Finite Element Method.
Authors:
AuthorsInstitution or Email of Authors
Lammering, R.UNSPECIFIED
Date:1990
Journal or Publication Title:ESA-TT-1216, November 1990.Uebersetzung des DLR-FB 90-01.
Status:Published
Keywords:Propfan, Finite Elements, Optimization, Layered Composites, Finite Sh ell Elements
HGF - Research field:UNSPECIFIED
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:no assignment
DLR - Research theme (Project):UNSPECIFIED
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity
Deposited By: elib DLR-Beauftragter
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 10:41

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