冰与锥体作用破碎周期及破碎长度分析  

Analysis of Ice Sheet Break Period and Length on the Ice-Breaking Cone

作　　者：屈衍[1] 岳前进[1] Casey Brister 

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：《冰川冻土》2003年第S2期326-329,共4页Journal of Glaciology and Geocryology

基　　金：冰与柔性结构相互作用的国际合作研究项目资助

摘　　要：在渤海加锥石油平台的现场测量中,发现了明显的冰激锥体结构振动现象.基于现场实验测量数据,对冰破碎周期进行了统计分析,结果表明:破碎周期的分布为对数正态或者正态分布.假定冰的一次破碎过程对应一次冰力变化,则冰力周期与破碎周期具有相同的分布.结合同步测量的冰速、冰厚资料,分析了冰厚、冰速与冰板破碎长度之间的关系.研究表明,冰的破碎长度约是冰厚的7倍,冰速对破碎长度没有明显影响.Ice\|breaking cone has shown great advantage in theoretical analysis and laboratory test in reducing ice force on marine structure. But ice\|induced vibration was measured in the full-scale test on JZ20\|2. Thus the dynamic ice force should be studied. Based on the full\|scale test, the distribution of the ice failure period is discussed in this paper. The effect of ice thickness and ice velocity on break length of an ice sheet is also studied. It is found that the distribution of ice failure periods is normal or lognormal. Ice thickness affects the ice break length rather than ice velocity.

关 键 词：锥体结构 破碎长度 随机冰力 冰力周期 

分 类 号：TV875[水利工程—水利水电工程]