Abstract
Here we study impact-initiated disturbances in fluid-filled elastic tubes. The undeformed tube diameter, wall thickness, and elastic modulus of the tube material are assumed to be functions of the distance along the centre line of the tube. The linearized version of the governing equations are solved by the Laplace transform, which is inverted by means of an approximate method. The original non-linear system of governing equations is solved numerically by the method of characteristics. Relationships between the axial fluid velocity and axial coordinate as well as between velocity and time are displayed for fixed values of time and axial coordinate respectively for the linear and nonlinear theory for ease of comparison.
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