海冰与锥体抗冰结构动力作用的数值模拟  

NUMERICAL SIMULATION OF DYNAMIC ICE ACTION ON CONICAL STRUCTURE

作　　者：武文华[1] 于佰杰[1] 许宁[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,大连116024

出　　处：《工程力学》2008年第11期192-196,共5页Engineering Mechanics

基　　金：国家863计划项目(2001AA602015);国家自然科学基金(10302005)

摘　　要：结合渤海海冰的实际情况,应用显式动力分析软件LS-DYNA模拟海冰和海洋平台锥体抗冰结构相互作用的弯曲断裂过程。模拟结果展示出和现场观测一致的弯曲断裂过程,海冰断裂长度和冰力分布符合现场实测数据结果。平台结构所受最大冰力出现在环向裂纹出现时;通过分析不同冰速对断裂长度、冰力和平台响应的影响可以发现断裂长度对冰速变化并不敏感,对海冰破碎周期有明显的影响。Using explicit dynamic analysis software LS-DYNA, the paper implements the numerical simulations of bending failure processes between sea ice and conical structures. The simulated breaking length and ice force distributions are consistent with those of full scale experiments. Ice force reaches its maximum value when the circumferential crack appears in the bottom of ice sheet. By analyzing the simulation results, it is found that the breaking length, ice force and responses of platform are not sensitive to the variations of ice velocity. The frequency of ice breaking increases with the increasing of ice velocity.

关 键 词：动力作用 海冰 锥体平台 数值模拟 弯曲断裂过程 

分 类 号：TU312.1[建筑科学—结构工程] P75[天文地球—海洋科学]