ACOUSTIC ANALYSIS AND DESIGN OF COMPLIANT CABLE-HOSE SYSTEMS

Starting with basic equations of mass continuity and momentum balance, incorporating viscous damping, the finite radial impedances of the ca ble as well as the hose, and the convective effect of mean flow, coupl ed wave equations have been derived for waves inside the cable and als o in the annulus of a cable-hose system, These have been solved togeth er as an eigenvalue problem, and thence a 4x4 transfer matrix has been derived, Applying appropriate boundary conditions, the desired 2x2 tr ansfer matrices have then been derived for the extended inlet and exte nded outlet type of elements, Then, axial transmission loss has been c alculated for a typical cable-hose configuration and has been compared with that computed by the classical equivalent sound-speed model in v ogue, which has been shown here (as well as earlier for hoses) to be a special case where the tube wall is assumed to be elastic but massles s, Finally, the effect of breakout noise on the design of cable-hose s ystems is discussed. (C) 1997 Institute of Noise Control Engineering.