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Influence of sailplane wing-bending flexibility on ‘1- Cosine’ gust loads

Published online by Cambridge University Press:  03 October 2016

E. Lasauskas
E. Lasauskas*
Affiliation:
Vilnius Gediminas Technical University (VGTU), Vilnius, Lithuania
*
edulas@vgtu.lt
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Abstract

Simultaneous modelling of aerodynamics, structure and flight dynamics is used to predict the gust loads on a model of 18-metre wingspan sailplane that includes bending flexibility. The ASWING software is used to analyse the time history of the wing-bending moment and the shear force at the wing root for the design gust speed and for the design maximum speed at different wavelengths of a ‘1-Cosine’ gust. Maximum values from the time history were compared with certification requirements for rigid sailplanes. The analysis revealed that wing-bending flexibility reduces the loads.

Keywords

sailplanewing bendinggust load

Information

Type
Research Article
Information
The Aeronautical Journal , Volume 120 , Issue 1234 , December 2016 , pp. 1943 - 1955
Copyright
Copyright © Royal Aeronautical Society 2016 

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References

REFERENCES

1. Thomas, F. Fundamentals of Sailplane Design, 1999, College Park Press, College Park, Maryland, US.Google Scholar
2. Noll, T.E., Brown, J.M., Perez-Davis, M.E., Ishmael, S.D., Tiffany, G.C. and Gaier, M. Investigation of the Helios Prototype Aircraft Mishap, 2004, NASA Langley Research Center, Hampton, Virginia, US.Google Scholar
3. Xiang, J., Yan, Y. and Li, D. Recent advance in nonlinear aeroelastic analysis and control of the aircraft, Chinese J Aeronautics, February 2014, 27, (1), pp 12–22.CrossRefGoogle Scholar
4. Avanzini, G., Capello, E. and Piacenza, I.A. Mixed Newtonian–Lagrangian approach for the analysis of flexible aircraft dynamics, J Aircr, September 2014, 51, (5), pp 1410–1421.CrossRefGoogle Scholar
5. Hesse, H., Palacios, R. and Murua, J. Consistent structural linearization in flexible aircraft dynamics with large rigid-body motion, AIAA J, March 2014, 52, (3), pp 528–538.CrossRefGoogle Scholar
6. Guo, D., Xu, M. and Chen, S. Nonlinear gust response analysis of free flexible aircraft, Int J Intelligent Systems and Applications, January 2013, 5, (2), pp 1–15.CrossRefGoogle Scholar
7. Patil, M.J. and Hodges, D.H. Flight dynamics of highly flexible flying wings, J Aircr, 43, (6), pp 1790–1799.CrossRefGoogle Scholar
8. Chudý, P. Response of a light aircraft under gust loads, Acta Polytechnica, 2004, 44, (2), pp 97–102.CrossRefGoogle Scholar
9.European Aviation Safety Agency (EASA). CS-22 Certification Specifications for Sailplanes and Powered Sailplanes, 2009, EASA, Köln, Germany.Google Scholar
10. Waibel, G. Load relief for light and small sailplanes? Technical Soaring, September 2011, 35, (3), pp 75–77.Google Scholar
11. Flomenhoft, H. Brief history of gust models for aircraft design, J Aircr, September 1994, 31, (5), pp 1225–1226.CrossRefGoogle Scholar
12. Hoblit, F.M. Gust Loads on Aircraft: Concepts and Applications, 1988, American Institute of Aeronautics and Astronautics, Washington, D.C., US.CrossRefGoogle Scholar
13. Wright, J.R. and Cooper, J.E. Introduction to Aircraft Aeroelasticity and Loads, 2007, John Wiley & Sons Ltd., Chichester, UK.CrossRefGoogle Scholar
14. Drela, M. ASWING Overview, 2010, http://web.mit.edu/drela/Public/web/aswing/.Google Scholar
15. Drela, M. Method for simultaneous wing aerodynamic and structural load prediction, J Aircr, August 1990, 27, (8), pp 692–699.CrossRefGoogle Scholar
16. Drela, M. Integrated simulation model for preliminary aerodynamic, structural, and control-law design of aircraft, 40th Structures, Structural Dynamics, and Materials Conference and Exhibit, 1999.CrossRefGoogle Scholar