Spectral fatigue analysis of deep-water jacket considering cycle degradation of pile foundation
Deep-water jacket platforms are long subjected to complex environmental loads.The influence of environmental cyclic loads can lead to changes in soil properties around the pile foundation,resulting in bearing capacity degradation.This paper studied a jacket platform at a water depth of 200 meters.Wave loads and water particle velocities were obtained using the Morison equation and Stokes wave theory.By analyzing and identifying the fatigue damage center and its transfer functions,wave responses in various directions were calculated.Spectral fatigue analysis considering pile foundation degradation was conducted based on the Palmgren-Miner linear cumulative damage theory.Case studies reveal that considering the effects of pile foundation degradation reduces the fatigue life of the deep-water jacket platform.
万方数据
维普
