Author
E. H. Dowell
Bio: E. H. Dowell is an academic researcher. The author has contributed to research in topics: Fuselage & Scale model. The author has an hindex of 1, co-authored 1 publications receiving 2 citations.
Topics: Fuselage, Scale model, Ground resonance, Limit cycle
Papers
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01 Nov 1985
TL;DR: In this paper, an approximate theoretical method is presented which determined the limit cycle behavior of a helicopter model which has one or two nonlinear dampers, and the relationship during unstable ground resonance oscillations between lagging motion of the blades and fuselage motion is discussed.
Abstract: An approximate theoretical method is presented which determined the limit cycle behavior of a helicopter model which has one or two nonlinear dampers. The relationship during unstable ground resonance oscillations between lagging motion of the blades and fuselage motion is discussed. An experiment was carried out on using a helicopter scale model. The experimental results agree with those of the theoretical analysis.
2 citations
Cited by
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TL;DR: In this article, the lagging motion of each helicopter blade is assumed to be of equal amplitude and equally apportioned phase, thus allowing a simplified analytical method to calculate the ground resonance instability of a helicopter model with nonlinear dampers in both the landing gear and blades.
Abstract: The lagging motion of each helicopter blade is assumed to be of equal amplitude and equally apportioned phase, thus allowing a simplified analytical method to be used to calculate the ground resonance instability of a helicopter model with nonlinear dampers in both the landing gear and blades. The geometrical nonlinearities of the blade lag motion and the influence of initial disturbances on ground resonance instability are also discussed. Finally an experiment is carried out using a helicopter scale model. The experimental data agree well with analysis.
23 citations
01 Jan 1988
TL;DR: A conceptual framework is provided for the field of nonlinear aeroelasticity and various important physical phenomena are identified, and the contents of the present book are placed in context.
Abstract: A conceptual framework is provided for the field of nonlinear aeroelasticity. Various important physical phenomena are identified, and the contents of the present book are placed in context.
5 citations