Resonance tests - vibration mode shapes from the wing torsion group

• Autorzy: Wiśniewski W.
• Języki publikacji: EN

Abstrakty

EN

Resonances of the „ wings torsion " mode shapes to a large extent depend on the structural parameters of the wing, and more specifically to the existence or not of fuel tanks at the wings ends, munitions hard points or engines mounted on the wings. In the paper the group of resonances is presented with mode shapes in which the one, two or three node aircraft wing torsion is present. It is shown in the paper, that these vibration mode shapes consist both of fuselage bending or torsion. Resonance frequencies with mode shapes in which one, two or three node wing torsion occurs depend fundamentally on existence of wing hardpoints. If hardpoints are occupied by fuel tanks, these frequencies are varying continuously in wide range. The various interesting from cognitive point of view combinations have place then, including variable frequencies and variable mode shapes as a function of fuel consumption. The aim for the analysis of 3 cases of resonance a wing torsion mode shapes of airplanes and gliders was to investigate the relationships and mechanisms that are taking place and operate between the torsioningl vibration of the wings and bending or torsion vibrations of the fuselage. Recognition of these phenomena should facilitate the researcher to understand and search effectively and explore the resonances of„ wing torsion " mode shapes.

Słowa kluczowe

EN

transport; aircraft; resonance tests; vibration mode; torsion wing

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2009
• Tom: Vol. 16, No. 4
• Strony: 557--561
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Wiśniewski W.

• Institute of Aviation Al. Krakowska 110/114, 02-256 Warszawa, Poland tel: [phone], fax: [phone],

Bibliografia

• [1] Ashawesh, G. M., Effect of wash-in and wash-out on the flutter characteristics of composite aircraft wings. Proceeding of 10th International Conference on Aerospace Science and Aviation Technology, Cairo, Egypt, 2003.
• [2] Hodges, D. H., Patil, M. J., Chae, S., Effect of Thrust on Bending-Torsion Flutter of Wings, Journal of Aircraft Vol. 39, No. 2, pp. 371 – 376, 2002.
• [3] Lokos, W. A., Candida D. Olney, C. D., Crawford, N. D., Rick Stauf, R., Reichenbach, E. Y.,Wing Torsional Stiffness Tests of the Active Aeroelastic Wing F/A-18 Airplane, Proceedings of 43rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Con. Denver, Colorado 2002.
• [4] Pendleton, E. W., Bessette, D., Field, P. B., Miller, G. D., Griffin, K. E., Active Aeroelastic Wing Flight Research Program: Technical Program and Model Analytical Development, Journal of Aircraft, Vol. 37, No. 4, 2000.
• [5] Wisniowski, W., Research of the dynamic properties of structures the models of interpretation, Journal of KONES, Vol. 15, No. 3, pp. 561-565, Warsaw 2008.
• [6] Wisniowski, W., Untypical Cases and Incorrect Results of Vibration Tests, Journal of KONES, Vol. 16, No. 1, pp. 591-597, Warsaw 2009.