VIBRATION TRANSMISSION FROM DECK TO HULL VIA A BULKHEAD

✍ Scribed by R.C.N. Leung

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 198 KB
• Volume: 213
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.1998.1530

✦ Synopsis

Machines on board a ship are mounted on decks, which are supported by bulkheads from the hull. This paper studies the vibration transmission characteristics along the transmission path of deck-bulkhead-hull. The model used in this study consists of two infinite parallel plates, representing a deck and a hull, connected by a single bulkhead. The excitation force is applied on the top plate, in the plane of the bulkhead. Thus, only in-plane waves exist in the bulkhead. The two infinite plates are assumed to have pure bending waves only. The analyses show that at low frequencies the two parallel plates are strongly coupled. At frequencies above the first resonance of the bulkhead due to shear waves, the two plates become uncoupled. The top plate, which the excitation is acted upon, exhibits the behaviour of a single infinite plate. The bottom plate, however, can be treated as a series of independent beam elements running perpendicular to the bulkhead.