A Direct Calculation Approach for Designing a Ship-shaped FPSO's Bow Against Wave Slamming Load

Wave slamming is a recognized hazard to FPSOs. Severe slamming may cause damage to structures and possible flooding of compartments. The consequences of wave slamming can be mitigated through a combination of enhancing structural design and implementing preventative operation procedures. The design of a FPSO is dependent on the installation site. This requires direct calculation tools, however a complete analysis system does not seem to be available. This paper presents a direct calculation approach, which may be used for designing shell scantlings of a FPSO’s bow against wave impact loads. This approach includes determining ship motions relative to waves, calculating wave slamming pressure, analyzing structural responses, and judging acceptance of a design. This approach is based on some engineering programs and analytical formulae; therefore, it is also a practical engineering analysis methodology. Its practicability is demonstrated by applying it to the design of a FPSO’s bow for three different installation sites. The approach is applicable to both new constructions and conversions, and can be used for investigating damages due to wave slamming.