Wave Dynamic Response and Parameter Sensitivity Analysis for the Deep-water Jacket Platform
Considering that the natural vibration period of 300 m jacket platform is very close to that of jack up platform,the wave dynamic response analysis method of jack up platform can be applied to deep-water jacket platform,but parameter sensitivi-ty analysis is required before application.The finite element model of 300 m jacket platform was established by SACS software,the JONSWAP wave spectrum and the linear superposition method were used to construct random waves satisfying the Gaussian condition.Based on time-domain method,the structural dynamic response under random wave loads was analyzed.The Winter-stein/Jensen method was applied to calculate the most probable maximum extreme of base shear and overturning moment and the dynamic amplification factor.The sensitivity analysis of dynamic amplification factor was carried out for the parameters such as wave transients,simulation step and time,random seed.The results showed that the dynamic amplification factor is sensitive to wave transients,simulation step and time,and random seed;when Winterstein/Jensen method is used for dynamic response anal-ysis of deep-water jacket platforms,more reasonable and accurate dynamic amplification factors can be obtained based on the pa-rameters obtained from sensitivity analysis.
万方数据
维普
