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Analysis of fuselage vibration during flapping flights and solution for reduce it

Vahdat, D ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. Publisher: 2006
  3. Abstract:
  4. This article presents the result of an analysis to determine the distance that the fuselage of a Flapping Flyer moves up and down when the wing flap and comparison it with experiments that was done on fuselage phenomena during flight of an ornithopters and Winged animals in Wind tunnel. It is suggested that this motion may reduce the efficiency of design, whereas the tendency for fuselage motion may be largely cancelled in the bi plane configuration. The article also answers a question that has puzzled for scientist. Why bodies of winged animals don't move up and down noticeably when they flaps their wing during flight? Finally we offer one solution for reduce this unwanted motion near 50 % in or models. There is some question whether the biplane design is properly designated as an ornithopter. All the birds in nature have two wings that flapping about hinges at the body. In prehistoric times nature caused the forelegs and bodies of some ancient dinosaur-like creature to sprout feathers (originally, it is thought, for insulation proposes).Eventually, these feathered forelegs developed to provide propulsive and supporting surface of all bird. Nowhere in nature our seen counter-flapping configuration with four wings which clap together. The closest is dragonfly which has four counter flapping wings in tandem arrangement. In as much as the analysis of this report is concern with the monoplane arrangement, this type of model is called an ornithopter, whereas the four-wing arrangement is referred to as a counter-flapping biplane
  5. Keywords:
  6. Bi plane configuration ; Flapping Flyers ; Monoplane arrangement ; Ornithopters ; Animals ; Mathematical models ; Vibration control ; Wind tunnels ; Fuselages
  7. Source: 44th AIAA Aerospace Sciences Meeting 2006, Reno, NV, 9 January 2006 through 12 January 2006 ; Volume 11 , 2006 , Pages 7681-7687 ; 1563478072 (ISBN); 9781563478079 (ISBN)
  8. URL: https://arc.aiaa.org/doi/10.2514/6.2006-644