Page 535 - Fluid-Structure Interactions Slender Structure and Axial Flow (Volume 1)
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NEWTONIAN DERIVATION OF THE NONLINEAR EQUATIONS            505

               After some further manipulations, the governing equations obtained are found to be the
               same as those derived by the energy method, equations (5.36a,b).
                 Finally,  it  can  be  shown  easily  that  equations (G.l3a,b)  are  equivalent  to
               equations (G.6a,b) simply by  letting  E  = 0 and  replacing xo by  s. In  other  words, the
               equations of the cantilevered pipe can be obtained from those of a pipe fixed at both ends
               by imposing the inextensibility condition.
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