Prediction of most probable extreme values for jackup dynamic analysis

摘要: Abstract Many important technical issues in the design of deep water jackup rigs stem from prediction extreme values global parameters such as platform sway, base shear, and overturning moment. Several analytical methods primarily based on time-domain dynamic simulation have been recommended SNAME T&R Bulletin 5–5A (hereafter referred to “the Bulletin”) realm so-called most probable maximum extreme. This paper compares four major dynamic, Bulletin, investigates random seed effect each method, exams convergence statistical properties within time simulation, presents impact response due various parameters, e.g. leg-to-hull flexibility, P-delta foundation fixity. Comparison among is presented terms calculated corresponding amplification factors. The structural models employed this investigation were constructed reflect behavior two service. These purposely selected represent widely used designs, which are different leg types, chord designed for depth.