Noise tolerant design, vibra8on monitoring & control on drilling pla<orms and oﬀshore structures Research in Singapore
Research Case Studies
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Prof’ E Mesbahi in collabora7on with a major Singapore shipyard Background While on-‐board comfort for workers is a vital for opera7onal eﬃcacy and safety in drilling opera7ons, the concept of crew habitability in rela7on to drilling vessels has assumed far greater importance in recent years. This reﬂects tougher regulatory criteria, and a greater apprecia7on of the fa7gue-‐inducing eﬀect and long-‐term health issues associated with protracted exposure to high levels of noise and vibra7on. Hence, shipbuilders are looking to limit noise and vibra7on as much as possible. This is par7cularly important on accommoda7on quarters on the drilling plaDorm. Ideally, poten7al problems should be iden7ﬁed at the earliest stages of design and build.
Methodology Acous7c studies will be undertaken from an early design stage by modelling structure and airborne noise characteris7cs of machinery and equipment on the drilling plaDorm predic7ng noise radiated to accommoda7on quarters. The results of these studies will help drive a balanced approach to noise reduc7on, guiding the ergonomic and eﬃcient accommoda7on layout, placement of equipment, structure design and moun7ng arrangements during the design stage. The research will also provide an ac7ve noise and vibra7on control system to reduce the residual noise and vibra7on that could not be eliminated by design; an example being the airborne noise and vibra7on from the engine room. This twin approach provides a holis7c solu7on to mi7gate noise and vibra7on on drilling plaDorms. The projects was conducted using the EDB IPP PhD program delivering both the research project and a PhD level employee expert in ﬁeld
Signiﬁcance This study will develop the state of the art in terms of the technology of noise and vibra7on reduc7on in oﬀshore structures. This will allow the construc7on and opera7on of plaDorms and rigs which have a more comfortable living and working accommoda7on for crew. This will reduce vibra7on and noise induced stress and fa7gue and consequently have far reaching posi7ve beneﬁts on crew safety and performance.
Airborne and Structure borne noise and vibra8on