北极海域半潜式海洋平台结构抗冰性能优化设计  

Optimal Structure Design of Anti-ice Performance of Semi-Submersible Offshore Platform in Arctic Sea

作　　者：张奥博 闯振菊 刘社文 李春郑 常欣 侯立勋 ZHANG Aobo;CHUANG Zhenju;LIU Shewen;LI Chunzheng;CHANG Xin;HOU Lixun(Naval Architecture and Ocean Engineering College,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]大连海事大学船舶与海洋工程学院,大连116026

出　　处：《中国造船》2023年第2期49-61,共13页Shipbuilding of China

基　　金：大连理工大学海岸和近海工程国家重点实验室开放基金(LP2115);大连市科技创新基金(2020JJ25CY016)。

摘　　要：针对冰载荷对海洋平台的影响远大于波浪载荷的情况,对比优化前后的半潜式海洋平台在平整冰和碎冰分别作用下的动态响应。采用离散元方法计算冰载荷,对平台立柱不同角度锥体结构所承受的冰载荷和平台的运动进行了比较,得出以下结论:立柱锥体结构相较于圆柱体结构具有更好的抗冰性能。在平整冰的作用下,倒锥体结构受到的冰载荷小于正锥体结构;而在碎冰的作用下,二者没有明显的优劣之分。最终选定了55°锥角结构进行结构优化设计,优化后平台的纵荡和纵摇均小于优化前的平台。优化结果可为在北极地区进行油气开采的海洋平台设计提供参考。In exploitation of oil and gas resources in the Arctic area,the effect of ice loads on offshore platforms is much greater than that of wave loads.Dynamic response of a semi-submersible platform before and after optimization is compared under the action of flat ice and broken ice respectively.The discrete element method is used to calculate the ice loads.The ice load and the motion of the platform under the conical structure with different angles are compared,and conclusions are drawn as follows.Ice resistance of the cone is better than the cylinder.Under the action of the level ice,ice loads on the upward cone are less than that on the downward cone.However,under the action of broken ice floes,there is no significant difference between the two structures.The cone with an angle of 55 degrees is selected to optimize the structure design,where the surge motion and pitch motion of the optimized platform are both smaller than that of the platform before optimization.The optimization results will provide a reference for the design of offshore platforms for oil and gas production in the Arctic area.

关 键 词：半潜式海洋平台 冰载荷 离散元方法 抗冰性能 结构优化 

分 类 号：P75[天文地球—海洋科学] P941.62