导管架式海洋平台全寿命极限承载力计算研究

对平台在全寿命期内,计及材料腐蚀、疲劳裂纹等结构损伤因素及其随机特性,基于固定式平台结构基底极限抗剪切能力计算方法,发展了一种平台全寿命期极限承载力计算方法。并以一位于墨西哥湾海域处八桩腿导管架平台为例,进行了平台全寿命期内动态承载力计算,同时考虑其随机分布的特性,进行了统计分析,得到平台在每个瞬时服役期内的极限承载力统计量随服役年限的变化规律。

STUDY ON THE ULTIMATE BEARING CAPACITY CALCULATION OF JACKET PLATFORM IN TOTAL LIFE CYCLE

Based on calculation method of the fixed platform structure substrate limit resist shear ability,injury factors and its characteristics of jacket platform in total life cycle such as corrosion and fatigue cracks and so on,are developed a ultimate bearing capacity in total life cycle calculation method.A jacket platform with eight legs located in Gulf of Mexico as an example,dynamic bearing capacity in total life cycle is calculated.At the same time,we consider its characteristics of random distribution and make them statistical analyzed,the ultimate bearing capacity statistic rule changing with platform age in every instantaneous life cycle is given in this paper.