A study of methods of characterising the effects of internal noise sources on submarine flank arrays

Forced vibration analysis of damped beam structures with composite cross-section using Timoshenko beam element

“…Almost all elastic structures exhibit very small damping so that their structural vibrations caused by various internal or/and external sources may produce the undesired noise as well as the unexpected structural dynamic instability. One critical situation is the underwater noise by the structural vibration of submarine for which the sound maneuvering becomes one of important requirements (Gargouri et al 1998). In such a situation, a useful passive technique for reducing the underwater noise is to coat the viscoelastic material layers over the surfaces of critical elastic members such as beam-, plate-and shell-like structures showing the major contribution to the underwater noise (Sainsbury andMasti 2007, Liu et al 2009).…”