冰-锥相互作用破坏全过程的有限元模拟  

SIMULATION OF THE WHOLE FAILURE PROCESS BY FEM DURING ICE-CONICAL STRUCTURES INTERACTION

作　　者：韩雷[1] 李锋[1] 岳前进[1] 

机构地区：[1]大连理工大学,大连116023

出　　处：《中国海洋平台》2007年第2期22-27,共6页China offshore Platform

基　　金：国家"863"计划资助项目(2001AA602015)

摘　　要：利用ANSYS对冰锥相互作用的破坏全过程进行系统的非线性分析,得出冰力-挠度关系曲线随破坏模式的变化规律,不同破坏模式间的主要区别反映在破坏过程的后期变形能力和冰力增量,反映了冰排破坏由延性向脆性的转变。结果表明,每一破坏过程的极值冰力总是对应于环向裂纹的形成,而最大极值冰力出现在破坏模式转变的过渡区内。An systemic nonlinear finite element analysis of the whole interaction process between sheet ice and conical structures is conducted by using ANASYS, and a group of the ice load-displacement curve with different failure modes is educed. The crucial distinction among different failure modes is reflected by the deform ability in later stage and the ice load increment; this actually reflects a transforming process of sheet ice from ductile failure into brittle failure. The results indicate that in each process the ultimate load of ice is always related with the form of the circumferential crack, and the maximum of the peak ice load appears within the transitional region.

关 键 词：冰排 锥体结构 过渡破坏 非线性有限元模拟 

分 类 号：P75[天文地球—海洋科学]