浮力塔平台吸力桩承载力研究  

Study on load bearing capacity of the suction caisson of a buoyant tower

作　　者：潘徐杰[1] 杜守继[1] CHEN Weimin WANG Ge 方智超 PAN Xu-jie;DU Shou-ji;CHEN Wei-min;WANG Ge;FANG Zhi-chao(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Wison Offshore Technology Inc.,Houston 77042,USA)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240 [2]Wison Offshore Technology Inc.,Houston 77042

出　　处：《船舶力学》2022年第2期215-223,共9页Journal of Ship Mechanics

摘　　要：浮力塔是一种全新的顺应式海洋平台类型,使用一个短基础吸力桩将平台主体固定在海床上,所以吸力桩的承载特性十分关键。基于现场海域的土壤取样,通过三轴压缩试验获得土样的参数。使用有限元分析软件Abaqus,结合修正剑桥模型,参考平台在现场的运动情况,进行吸力桩承载力的三维模拟,得出吸力桩在各个方向上的载荷-位移曲线。依据平台的现场观测结果可以看出,吸力桩随平台在安全范围内工作。接着将各个方向上的载荷-位移曲线转换为土弹簧刚度矩阵,并通过HydroStar进行运动分析,运动的预报结果与实际观测结果吻合。A buoyant tower is a new type of compliant offshore platform which uses a suction caisson to fix the hull of the platform on the seabed,so the response of the suction caisson is very important.Based on the field soil sampling,parameters of soil samples were obtained by triaxial compression test.According to the actual working conditions of the platform,a series of numerical simulations were carried out based on Abaqus,and the P-S curves of the suction caisson were obtained.According to the field observation of the platform,it could be seen that the suction caisson worked well in waves.Then P-S curves were transformed into soil springs,which were transformed into stiffness matrices.With the stiffness matrices,the motion analysis was carried out by HydroStar.The results show that the predictions fit well with the field observation.

关 键 词：浮力塔平台 吸力桩 承载力 土弹簧 

分 类 号：P752[天文地球—海洋科学]