In this paper, the effect of aerodynamic damping produced by store rear horizontal fins on the aeroelastic instability of a wing with a large underwing store is investigated in an incompressible flow. The wing is modeled by using the classical Euler–Bernoulli beam theory while the unsteady strip aerodynamic theory based on the Wagner function is used to simulate the aerodynamic field. The underwing store is modeled as a concentrated mass attached to the wing by a rigid pylon and has rear horizontal fins. The numerical results of the developed generic and simple model are compared with available results, and an excellent agreement is observed. It is found that the aerodynamic damping of the store produced by its rear fin can compensate the flutter boundary of the wing-store configuration and therefore for more accurate analysis, in addition to the store weight and location, the effect of store fin must also be considered.
GolandMLukeYL. The flutter of a uniform wing with tip weights. J Appl Mech1948; 15: 13–20.
2.
Runyan HL and Sewall JL. Experimental investigation of the effects of concentrated weights on flutter characteristics of a straight cantilever wing. NACA TN 1594, 1948.
3.
Woolston DS and Runyan HL. Appraisal of method of flutter analysis based on chosen modes by comparison with experiment for cases of large mass coupling. NACA TN 1902, 1950.
4.
Runyan HL and Watkins CE. Flutter of a uniform wing with an arbitrary placed mass according to a differential equation analysis and a comparison with experiment. NACA TN 1848, 1949.
5.
Runyan HL. Effect of a flexibly mounted store on the flutter speed of a wing. NASA-CR-159245, 1980.
FazelzadehSAMazidiAKalantariH. Bending-torsional flutter of wings with an attached mass subjected to a follower force. J Sound Vib2009; 323: 148–162.
17.
FazelzadehSAMarzoccaPMazidiA. Divergence and flutter of shear deformable aircraft swept wings subjected to roll angular velocity. Acta Mech2010; 212: 151–165.
18.
FazelzadehSAMarzoccaPRashidiE. Effects of rolling maneuver on divergence and flutter of aircraft wing store. J Aircraft2010; 47: 64–70.
19.
MazidiAFazelzadehSAMarzoccaP. Flutter of aircraft wings carrying a powered engine under roll maneuver. J Aircraft2011; 48: 874–884.
20.
Nikbay M and Acar P. Robust aeroelastic design optimization of wing/store configurations based on flutter criteria. In: 12th AIAA aviation technology, integration, and operations (ATIO) conference and 14th AIAA/ISSMO multidisciplinary analysis and optimization conference, Indianapolis, Indiana, 2012.
21.
MardanpourPRichardsPWNabipourO. Effect of multiple engine placement on aeroelastic trim and stability of flying wing aircraft. J Fluids Struct2014; 44: 67–86.
22.
MazidiAKalantariHFazelzadehSA. Aeroelastic response of an aircraft wing with mounted engine subjected to time-dependent thrust. J Fluids Struct2013; 39: 292–305.
23.
AmoozgarMRIraniSVioGA. Aeroelastic instability of a composite wing with a powered-engine. J Fluids Struct2013; 36: 70–82.
24.
Firouz-AbadiaRDAskarianbARZarifianP. Effect of thrust on the aeroelastic instability of a composite swept wing with two engines in subsonic compressible flow. J Fluids Struct2013; 36: 18–31.
25.
MeirovitchL. Analytical methods in dynamics, New York: Macmillan, 1967.
26.
Hodges DH and Dowell EH. Nonlinear equations of motion for the elastic bending and torsion of twisted nonuniform rotor blades. NASA TN D-7818, 1974.
27.
EtkinBReidLD. Dynamics of flight, stability and control, New York: John Wiley & Sons Inc, 1996.
28.
DowellEHCrawleyHCCurtissHC. A modern course in aeroelasticity, Boston: Kluwer Academic Publisher, 1995.
29.
HodgesDHPierceGA. Introduction to structural dynamics and aeroelasticity, Cambridge: Cambridge University Press, 2002.
30.
LeeBHKGongLWongYS. Analysis and comparison of nonlinear dynamic response of a two-degree-of freedom system and its application in aeroelasticity. J Fluids Struct1997; 11: 225–246.
31.
HoweD. Aircraft loading and structural layout, London: Professional Engineering Publishing, 2002.
