用于锥体冰载荷计算的改进模型  

Advanced model for calculation of ice force on conical structure

作　　者：冯玮[1] 时忠民[1] 刘立名 

机构地区：[1]中海石油研究中心 [2]海洋工程股份有限公司

出　　处：《中国海上油气（工程）》2004年第4期280-284,共5页China Offshore Oil and Gas

基　　金：国家高技术研究发展计划 ( 863计划 ) ( 2 0 0 1AA60 2 0 15 )资助成果

摘　　要：研究了海冰与锥体结构的相互作用 ,对已被人们广泛认可的Croasdale模型存在的问题进行了分析。根据渤海石油平台冰激振动现场录像观测结果 ,将冰排分为脱离水面部分和漂浮于水面部分 2个区域 ,建立了用于锥体冰载荷计算的改进模型 ,并根据弯矩分布状态判断冰排可能的破断位置 ,从而得到了冰排与锥体相互作用时的冰载荷解析表达式。与以往研究者的实验结果对比 ,当锥面摩擦系数不大时 ,改进模型的计算结果与实验结果平均值吻合较好。改进的锥体冰载荷计算模型可以为近海冰区抗冰结构的设计与实验提供更准确的参数。The interaction between sea ice and conical structure is studied. The widely accepted model of Croasdale is analyzed and its problems are analyzed. Based on the field observation record, the ice sheet is divided into the emersed part and floating part and a new method for calculation of ice force on conical structure named “Advanced Model' is built,and the bending moment distribution in ice sheet is analyzed to determine where bending failure will occur, therefore the analytic solution of ice force on conical structure is got. Comparing with experiment results from several previous researchers, it is shown that the theoretical results in this paper fit to the experimental data very well when friction coefficient is small on conical surface. “Advanced Model' can provide reference for design and field experiment of offshore ice-resistant structure.

关 键 词：冰排 海冰 锥体结构 冰激振动 冰区 渤海 观测结果 冰载荷 抗冰 石油平台 

分 类 号：TE95[石油与天然气工程—石油机械设备] P731.15[天文地球—海洋科学]