冰锥作用位置对冰弯曲破坏模式影响数值分析  

Numerical analysis for position-effect of ice-cone interaction on ice bending failure modes

作　　者：武文华[1] 于佰杰[1] 岳前进[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116024

出　　处：《大连理工大学学报》2009年第3期313-316,共4页Journal of Dalian University of Technology

基　　金："八六三"国家高技术研究发展计划资助项目(2001AA602015);国家自然科学基金资助项目(10302005)

摘　　要：通过显式动力分析软件ANSYS/LS-DYNA模拟了冰锥相互作用的动态断裂过程,得到了冰排内部的应力分布和裂纹扩展趋势.冰上下表面的应力分布有较大差别,在冰锥接触处首先出现径向裂纹.基于数值结果比较了在不同冰锥作用位置时,冰应力分布及裂纹扩展趋势的差异,并进一步分析了冰锥作用位置和破坏模式转变的关系.结果表明,冰锥作用位置对冰排应力分布和裂纹扩展趋势的影响较小,不是影响破坏模式转变的一个重要因素.Based on explicit dynamic software ANSYS/LS-DYNA, the numerical simulation for crack evolution of the interaction between an ice sheet and conical structure is presented. The stress distribution and crack propagation inclination in ice sheet are obtained. There is great difference in the stress distribution between the top and the bottom surface of ice. Radial crack appears firstly at ice-cone contact position. The difference of ice stress distribution and the crack propagation inclination with different ice-cone contact positions is studied on the basis of numerical results. The relationship between the ice-cone contact position and failure mode transform is also analyzed. The results show that ice-cone contact position has less effect on ice sheet stress distribution and crack propagation. Ice-cone contact position is not the sensitive factor of failure modes transition.

关 键 词：冰锥作用位置 破坏模式 裂纹扩展 数值模拟 

分 类 号：TU312.1[建筑科学—结构工程]