Earl H. Dowell, Howard C. Curtiss Jr. (auth.), Earl H.'s A modern course in aeroelasticity PDF

By Earl H. Dowell, Howard C. Curtiss Jr. (auth.), Earl H. Dowell, Howard C. Curtiss Jr., Robert H. Scanlan, Fernando Sisto (eds.)

ISBN-10: 0792301854

ISBN-13: 9780792301851

ISBN-10: 9401578583

ISBN-13: 9789401578585

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Extra resources for A modern course in aeroelasticity

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As q --+ qo, ~ (and {a})--+oo. Another qualitatively different type of result may sometimes occur. 14. 13 Roll rate vs dynamic press ure. 14 Roll rate vs dynamic pressure. then 'rolling reversal' is said to have occurred and the corresponding q = qR is called the 'reversal dynamic pressure'. The basic phenomenon is the same as that encountered previously as 'control surface reversal'. 5a,b. It is worth emphasizing that the divergence condition obtained above by permitting p to be determined by (static) rolling equilibrium will be different from that obtained previously by assuming p = O.

6a (Nonlinear) equilibria tor elastic twist: e > O. 6b (Nonlinear) equilibria tor elastic twist: e < O. 6. where qo, = -K.. 6 has never been observed experimentally. , is finite. It would be most interesting to try to achieve the above equilibrium diagram experimentally. The above discussion does not exhaust the possible types of nonlinear behavior for the typical seetion model. 2 ODe dimensional aeroelastic model 01 airfoils Beam-rod representation ollarge aspect ratio wingt We shall now turn to a more sophisticated, but more realistic be am-rod model which contains the same basic physical ingredients as the typical section.

Shute [12], p. 95. t Dowell [13], p. 19, Kornecki [14], Kornecki, Dowell and O'Brien [15]. 6 Sweptwing divergence A swept wing, one whose elastic axis is at an oblique angle to an oncoming fluid stream, offers an interesting variation on the divergence phenomenon. 17. 1t is assumed that the wing can be modeled by the bending-torsion deformation of a beam-rod. 2) Here h is the bending displacement of the elastic axis and is assumed positive downward. a e , the elastic twist about the y axis, is positive nose up.

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A modern course in aeroelasticity by Earl H. Dowell, Howard C. Curtiss Jr. (auth.), Earl H. Dowell, Howard C. Curtiss Jr., Robert H. Scanlan, Fernando Sisto (eds.)


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