Page 289 - Fluid-Structure Interactions Slender Structure and Axial Flow (Volume 1)
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270                SLENDER STRUCTURES AND AXIAL FLOW


















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                     Figure 4.38  (a) Swimming motions of  the common eel, Anguilla vulgaris, from photographs by
                     Gray (1968), as given in Lighthill (1969). (b) Schematic elevation of the catamaran used to demon-
                     strate ichthyoid propulsion, showing: A, overhead electrical conductor; B,  ‘trolley-type’ conductor;
                     C, motor-pump unit; D, catamaran; E, pump inlet; F, pump outlet; G, thin brass plate; H, Tygon
                                  pipes; I, flow adaptor; J,  clips for attachment (PaYdoussis 1976).


                     4.7.3  Vibration attenuation

                     Another  application (Sugiyama et ul.  1992,  1996b) involves one or more cantilevered
                     pipes conveying fluid attached to a vibrating structure for the purposes of  dumping  its
                     vibration.
                       Looking at  Figure 3.27, for instance, it  is  clear that  for  u = 4 there exists optimum
                     damping of  the pipe  in  all  its  modes. Hence, if  this  pipe were  attached to  a vibrating
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