Abstract
Floating Production Storage and Offloading (FPSO) is the mobile offshore structure like a ship where the wave load acts on the ship’s hull periodically. The influence of the cyclic load must be analyzed for the fatigue life of the FPSO. The objective of the present study is to analyze the fatigue life of the FPSO. Two models of FPSO are taken to be analyzed. To calculate fatigue life, JONSWAP wave spectrum is adopted. Then, calculate the Response Amplitude Operator (RAO) to obtain the stress response of the spectra. Based on the stress response spectra calculation, the zero and second moment may be determined using Simpson’s rule. The stress cycle can also be obtained and the failure cycle is determined from the S-N curve. From the S-N curve, the X parameter is used for the main parameter. According to this, the fatigue life of FPSO can be obtained.
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