بررسی رفتار آیروالاستیک بال کامپوزیتی در جریان تراکم‌پذیر

نوع مقاله: مقاله پژوهشی

نویسندگان

1 کارشناس / دانشکده مهندسی هوافضا، دانشگاه صنعتی شریف

2 عضو هیات علمی / دانشکده مهندسی هوافضا، دانشگاه صنعتی شریف

3 دانشجوی دکتری / دانشکده مهندسی هوافضا، دانشگاه صنعتی شریف

چکیده

در این مقاله رفتار آیروالاستیک بال ساخته شده از مواد مرکب در جریان تراکم‌پذیر بررسی شده است. برای شبیه‌سازی رفتار سازه بال از تیر ساخته شده از مواد غیر ایزوتروپ که دارای سطح مقطع بسته با دیواره‌های نازک/ ضخیم است، استفاده شده است. برای ایجاد همبندی مناسب بین مودهای خمش و پیچش، روش لایه‌چینی سختی محیطی نامتقارن به‌کار گرفته شده است. برای شبیه‌سازی آیرودینامیک ناپایای تراکم‌پذیر نیز از روش آیرودینامیک نواری براساس استفاده از توابع اندیسی (Indicial Function) در محدوده تراکم‌پذیر استفاده شده است. در نهایت نتایج برای چند بال نمونه ارایه شده و با مراجع موجود مقایسه شده است.

کلیدواژه‌ها


عنوان مقاله [English]

Aeroelastic Behavior of Composite Wings in Compressible Flow

نویسندگان [English]

  • Tooraj Farsadi 1
  • Hasan Haddadpour 2
  • Seyed Ali Sina 3
چکیده [English]

In this paper, the aeroelastic behavior of composite wings has been studied. Anisotropic thick/thin beam with closed cross section is utilized as structural model. Circumferentially asymmetric stiffness layup scheme is used to obtain the preferred coupling between bending and torsion modes. Aerodynamic strip theory in conjunction with the indicial aerodynamic is used to obtain the aerodynamic loads in compressible flight speeds. To validate the aeroelastic model and results, comparisons between the obtained results and those available in the literature were performed and an excellent agreement was reported.

[1] Hoskins, B.C. and Baker, A.A., “Composite Materials in Aircraft Structures”, AIAA Educ. Series, Renton, VA. 1986,

[2] Qin, Z., “Vibration and Aeroelasticity of Advanced Aircraft Wings Modeled as Thin-Walled Beams–Dynamics, Stability and Control”, Virginia Polytechnic .Institute and StateUniversity, Ph.D. dissertation, 2001

[3] Weisshaar, T.A., “Aeroelastic Tailoring-Creative Use of Unusual Materials”, AIAA Paper 87-97, AIAA/ASME/ASCE/AHS 28th Structures, Structural Dynamics and Materials Conference, April 9-10, 1987.

[4] Lazarus, K.B., Crawley, E.F. and Bohlmann, J.D, “Static Aeroelastic Control Using Strain Actuated Adaptive Structures” J. of Intelligent Material System and Structures, Vol. 2, July 1991, pp.386-410.

[5] Ehlers, S.M. and Weisshaar, T.A., “Static Aeroelastic Behaviour of an Adaptive Laminated Piezoelectric Composite Wing”, Proceeding of the  AIAA/ASME/ASCE/AHS/

[6] ASC 31th Structures, Structural Dynamics and Materials Conference, Long Beach, CA, April 1990.

[7] Crawley, E.F, and Dugundji, J., “Frequency Determination and Nondimensionalization for Composite Cantilever Plates”, Journal of Sound and Vibration, Vol. 72, No. 1, 1980, pp. 1-10.

[8] Crawley, E.F., and Jensen, D.W., “Frequency Determination Techniques for Cantilevered Plates with Bending-Torsion Coupling” AIAA J., Vol. 22, 1984, pp.415-420.

[9] Kaza K.R.V., and Kielb, R.E., “Effects of Warping and Pretwist on Torsional Vibration of Rotating Beams” Transactions of ASME, J. of Applied Mechanics, Vol. 51, Dec., 1984, pp. 913-920.

[10] Librescu, L., and Song, O., “Behavior of Thin-Walled Beams Made of Advanced Composite Materials and Incorporating Non-Classical Effects”, Applied Mechanics Reviews, Vol. 44, No. 11, Part 2,1991, pp. 174-180.

[11] Timoshenko, S.P., “On the Transverse Vibrations of Bars of Uniform Cross Section” Philosophical Magazine, Series 6, Vol 43, 1922, pp. 125-131.

[12] Davies, R.M., “The Frequency of Transverse Vibration of a Loaded Fixed-Free Bar: IV The Effects of Shearing of the Bar” Philosophical Magazine, Series 7, Vol. 23, 1937, pp 1129-1145.

[13] Jacobsen, L.S., “Natural Frequencies of Uniform Cantilever Beams of Symmetrical Cross- Section” J. of Applied Mechanics, A-1, Vol. 5, 1938.

[14] Qin, Z., and Librescu, L., “Dynamic Aeroelastic Response of Aircraft Wings Modeled as Anisotropic Thin-Walled Beams” Journal of Aircraft, Vol. 40, No. 3, 2003.

[15] Haddadpour, H., Kouchakzadeh, M.A., and Shadmehri, F., “Aeroelastic instability of aircraft composite wings in an incompressible flow“, Composite Structure, Vol. 83, 2008, pp 93-99.

[16] Marzocca, P., Librescu, L., and Chiocchia, G., “Aeroelastic response of a 2-D airfoil in a compressible flow field and exposed to blast loading”, Aerospace Science and Technology, 2002, pp 259-272.

[17] Barmby, J. G., Cunningham, H. J., and Garrick, I. E., “Study of Effects of Sweep on the flutter of Cantilever Wing”, NACA TN-2121. 1950.