锥体结构的冰激振动与冰力函数  

ICE-INDUCED VIBRATION AND ICE FORCE FUNCTION OF CONICAL STRUCTURE

作　　者：岳前进[1] 毕祥军[1] 于晓[1] 时忠民[2] 

机构地区：[1]大连理工大学 [2]中海石油研究中心

出　　处：《土木工程学报》2003年第2期16-19,32,共5页China Civil Engineering Journal

基　　金：国家自然科学基金委员会;中海石油总公司联合资助重点项目(597391 79)

摘　　要：基于现场原型结构测量 ,研究了冰与锥体结构相互作用的动冰力与冰激锥体结构振动 ,建立了确定性冰力函数。实测发现 ,冰与锥体结构作用时以弯曲破坏为主 ,冰的破碎长度与冰厚成正比 ,冰的破碎频率随冰速增加 ,并有可能达到结构的固有频率。通过分析冰的破坏过程与冰压力盒测量的冰力时程 ,建立了三参数的冰力函数 。A deterministic ice force function of the conical structure is proposed in the paper It is based on the full?scale tests conducted on offshore jacket platforms in northern China The study shows that the ice force on the conical structure mainly fails in bending with definite breaking length The length is proportioned to the ice thickness For a slender structure with break?ice cone,the period of ice force near or even equal to the natural period of the structure The three parameters of the ice force are determined by the ice failure process and the measured data

关 键 词：锥体结构 冰激振动 冰力函数 原型结构 测量 

分 类 号：TU336[建筑科学—结构工程]