多桩锥体海洋平台结构冰荷载遮蔽效应离散元分析  

Discrete element analysis of shadowing effect of ice load on multi-leg conical offshore platform structure

作　　者：王帅霖 狄少丞[1] 季顺迎[1] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116023

出　　处：《海洋工程》2016年第2期1-9,共9页The Ocean Engineering

基　　金：国家自然科学基金资助项目(41176012);国家海洋公益性行业科研专项经费资助项目(201105016;201205007);高等学校博士学科点专项科研基金资助项目(20130041110010)

摘　　要：在海冰与多桩锥体海洋平台结构的相互作用中,平台结构总冰力在海冰流向和桩腿方位的影响下呈现出显著的遮蔽效应。采用具有粘结-破碎效应的离散元方法,基于GPU并行的高性能计算,对不同冰向下锥体海洋平台结构的冰荷载进行了数值分析,确定了不同冰向下平台结构各桩腿的冰力衰减系数并分析了总冰力的遮蔽效应。最后,对自由边界影响下多桩平台结构冰荷载遮蔽效应的产生机理进行了讨论。本文工作可为多桩腿平台结构的冰荷载特性、冰激结构振动以及冰区结构设计提供参考。During the interaction between sea ice and multi-leg conical offshore platform structure, the global ice load has obvious shadowing effect under the influence of ice drifting direction and pile orientation. In this study, the discrete element method （DEM） with bonding-breaking effect is developed to simulate the ice load on multi-leg conical structure with GPU-based parallel computational technique. The attenuation coefficient of ice load on each pile is determined to analyze the shadowing effect of global ice load in various ice drifting directions. Finally, the mechanism of shadowing effect of global ice load on multi-leg platform is discussed considering the effect of free boundary. This work can be of benefit to the analysis of ice load on multi-leg platform, ice-induced vibration of offshore structure and the design of structure in ice field.

关 键 词：多桩锥体海洋平台 离散元方法 GPU并行计算 冰荷载 遮蔽效应 

分 类 号：P731.15[天文地球—海洋科学]