MODELING AND ANALYSIS OF TILT-ROTOR AEROMECHANICAL PHENOMENA

Citation
Sm. Barkai et al., MODELING AND ANALYSIS OF TILT-ROTOR AEROMECHANICAL PHENOMENA, Mathematical and computer modelling, 27(12), 1998, pp. 17-43
Citations number
31
Categorie Soggetti
Mathematics,"Computer Science Interdisciplinary Applications","Computer Science Software Graphycs Programming",Mathematics,"Computer Science Interdisciplinary Applications","Computer Science Software Graphycs Programming
ISSN journal
08957177
Volume
27
Issue
12
Year of publication
1998
Pages
17 - 43
Database
ISI
SICI code
0895-7177(1998)27:12<17:MAAOTA>2.0.ZU;2-E
Abstract
The paper presents a recent effort to explore tilt-rotor aeromechanica l phenomena with an emphasize on aeroelastic stability in forward flig ht (airplane mode). A general tilt-rotor model has been developed and implemented using a numerical technique that preserves symbolic exactn ess of the equations of motion. The stability study is based on an eig envalue analysis about a nonlinear periodic trim solution. The present method enables both high resolution periodic response, and clear trac ing of the instability drivers by providing the exact partial derivati ves of the involved degrees of freedom in each one of the associated e quations of motion. In addition to the common way of identifying trend s and sensitivities by parametric study, the present approach supplies information about the effectiveness of possible mechanisms that are n ot included in the baseline model. The present results demonstrate the ability of the method to provide such unique insight into the aeromec hanical phenomena in forward flight. illustrative indications regardin g required tilt-rotor design features that will postpone the instabili ty phenomena are discussed. (C) 1998 Elsevier Science Ltd. All rights reserved.