AXISYMMETRICAL WAVE TRANSFER-FUNCTIONS OF FLEXIBLE TUBES

The input and transfer impedances of fluid-filled pipes are calculated by using a wave approach. The pipe walls can have orthotropic elastic properties associated with braided rubber hose. The input and transfe r impedances of a water-filled plain rubber hose are plotted for zero pressurization and positive and negative pressure. It is found that th e pressure for this case does not greatly affect the stiffness. Input and transfer impedances are also plotted for a braided rubber hose whi ch demonstrates the significant pressure stiffening effects found in p ractice. (C) 1997 Academic Press Limited.