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http://dx.doi.org/10.5139/JKSAS.2008.36.2.163

Assessment of Structural Modeling Refinements on Aeroelastic Stability of Composite Hingeless Rotor Blades  

Park, Il-Ju (건국대학교 항공우주정보시스템공학과)
Jung, Sung-Nam (건국대학교 항공우주정보시스템공학과)
Kim, Chang-Joo (건국대학교 항공우주정보시스템공학과)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.36, no.2, 2008 , pp. 163-170 More about this Journal
Abstract
The aeroelastic stability analysis of a soft-in-plane, composite hingeless rotor blade in hover and in forward flight has been performed by combining the mixed beam method and the aeroelastic analysis system that is based on a moderate deflection beam approach. The aerodynamic forces and moments acting on the blade are obtained using the Leishman-Beddoes unsteady aerodynamic model. Hamilton's principle is used to derive the governing equations of composite helicopter blades undergoing extension, lag and flap bending, and torsion deflections. The influence of key structural modeling issues on the aeroelastic stability behavior of helicopter blades is studied. The issues include the shell wall thickness, elastic couplings and the correct treatment of constitutive assumptions in the section wall of the blade. It is found that the structural modeling effects are largely dependent on the layup geometries adopted in the section of the blade and these affect on the stability behavior in a large scale.
Keywords
Aeroelastic Stability; Forward Flight; Mixed Beam Method; Structural Modeling Issues;
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Times Cited By KSCI : 1  (Citation Analysis)
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