The Application Of Formal Safety Assessment On FPSO's Operation

Traditional theories of ship design and strength analysis are mainly applied to review the ship safety under the situation of safety, overlook the risk analysis, specially the influence to ship operation safety by human factors. Normally, the averages can only be handled by the afterwards research. It causes the awkward status quo that the accidents are not reduced markedly with the development of ship structure design methods and soft wares.Therefore, this paper try to change the traditional ideas, not only evaluate the ship operation safety under the safety situation, but also take aim at the damaged ship hull, assess the risk under the lapse and critical situation. It takes the preventive method to predict and initiatively control the risks that may induce to the averages.With this understanding, this paper chooses the longitudinal strength of hull girder as the disabled mode, by the calculation of FPSO, predicts the ultimate strength and effective lifetime of the hull. Expected results of examples are obtained, which provide the analysis data for the further risk assessment.Subsequently, the basic measures and procedures of FSA are presented. Human factors/human errors are considered emphatically in this method. Policy decisions about reducing risk are put forward by risk analysis, and assessment of cost-benefits is made. Taking "Nanhai fenjin" FPSO as example, the analyses show that the loading/unloading courses of the FPSO have marked effects on the longitudinal strength of hull girder and safety. So the safety assessment aiming at these effects has been carried out by using the five standard procedures of FSA, and the feasibility of putting the theory into practice is explored, which is about human factor risk analysis and FSA. The emergency response measurements for ship damage due to collision are also given.The achievements in this paper can provide theory basis and technical conditions for enhancing FPSO operating safety and economic benefits, and provide theory support and technical guidance for improve the follow-up and similar ship design. The most important contribution of the research is that it hangs together the engineering technology with the science of administration for the maritime circle.