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Lookup NU author(s): Xi Ji,
Dr Cheng Chin,
Professor Ehsan Mesbahi
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Structure-borne noise is an important aspect ofoffshore platform sound field. It can be generated either directly byvibrating machineries induced mechanical force, indirectly by theexcitation of structure or excitation by incident airborne noise.Therefore, limiting of the transmission of vibration energythroughout the offshore platform is the key to control the structurebornenoise. This is usually done by introducing damping treatmentto the steel structures. Two types of damping treatment using onboardare presented. By conducting a Statistical Energy Analysis(SEA) simulation on a jack-up rig, the noise level in the source room,the neighboring rooms, and remote living quarter cabins arecompared before and after the damping treatments been applied. Theresults demonstrated that, in the source neighboring room and livingquarter area, there is a significant noise reduction with the dampingtreatment applied, whereas in the source room where air-borne soundpredominates that of structure-borne sound, the impact is notobvious. The conclusion on effective damping treatment in theoffshore platform is made which enable acoustic professionals toimplement noise control during the design stage for offshore crews’hearing protection and habitant comfortability.
Author(s): Ji X, Chin CS, Mesbahi E
Publication type: Article
Publication status: Published
Journal: International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering
Print publication date: 01/10/2015
Online publication date: 01/10/2015
Acceptance date: 01/11/2015