Fatigue Reliability Assessment of Semi-submersible Platforms under Stress Wide-band Characteristics
There are a lot of uncertainties in the calculation of fatigue damage of offshore platforms,and the use of determin-istic methods for fatigue assessment has limitations.Considering the simplicity of calculation,the conventional fatigue reliability analysis method has been derived based on the narrow-band distribution,but it is inconsistent with the wide-band characteristics of hot spot stress under actual sea conditions.To make the evaluation results more accurate,a fatigue reliability assessment meth-od was proposed based on wide-band stress.A semi-submersible platform in the South China Sea was taken as an example to cal-culate the time-varying fatigue reliability index,which verified the applicability and feasibility of the method.
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