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Response, loads, and stability of interconnected rotor-body systems

Suresh, JK and Nagabhushanam, J (1997) Response, loads, and stability of interconnected rotor-body systems. In: Journal of Aircraft, 34 (3). pp. 416-426.

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Abstract

A rotor-body system with blades interconnected through viscoelastic elements is analyzed for response, loads, and stability in propulsive trim in ground contact and under forward-flight conditions, A conceptual model of a multibladed rotor with rigid flap and lag motions, and the fuselage with rigid pitch and roll motions is considered, Although the interconnecting elements are placed in the in-plane direction, considerable coupling between the flap-lag motions of the blades can occur in certain ranges of interblade element stiffness, Interblade coupling can yield significant changes in the response, loads, and stability that are dependent on the interblade element and rotor-body parameters, Ground resonance stability investigations show that by tuning the interblade element stiffness, the ground resonance instability problem can be reduced or eliminated, The interblade elements with damping and stiffness provide an effective method to overcome the problems of ground and air resonance.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Institute of Aeronautics and Astronautics.
Keywords: Helicopter rotor;Viscoelasticity;Numerical method; Joints;Beam(mechanics);Aeroelasticity;Dynamic stability; Vibration damping;Fasteners;N body system.
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 30 Jun 2011 12:39
Last Modified: 30 Jun 2011 12:39
URI: http://eprints.iisc.ernet.in/id/eprint/38390

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