柔性海洋结构冰激振动问题的对策  

Countermeasures to Ice-Induced Vibrations of Offshore Flexible Structures

作　　者：王翎羽[1] 陈星[1] 宋安[1] 郑沧波 

机构地区：[1]天津大学,天津300074 [2]中海石油工程设计公司,天津塘沽300452

出　　处：《中国海上油气（工程）》1994年第4期11-17,共7页China Offshore Oil and Gas

摘　　要：冰荷载对海洋结构的威胁除了它们的高荷载外,更多的在于显著的动力效应。由于冰对结构物的剧烈振动,导致了多起海洋结构被破坏的事例,因此,必须采取措施减小海洋结构的振动。本文通过分析冰荷载及其引起结构振动的特点,提出和归纳了改变振源特性、隔振、动力消振以及优化结构振型等一系列用于减小结构冰激振动的措施,并结合一些工程实例说明这些减小冰振的措施是切实可行的。The ice loads threaten offshore structures by their evident dynamic effects in addition to high load. There are a few accidental events causing damage of offshore structures due to severe ice-induced vibra-tions, so it is necessary to reduce vibrations of offshore structures with some measures. On the basis of analysing the features of ice loads and ice-induced structural vibration . a series of measures to reduce ice-induced structural vibration such as alternation of vibration source feature , isolated vibration ,dynamically e-limanating vibration , and optional structure vibration types are presented and summarized. Some engineering examples illustrate the measures being feasible.

关 键 词：海洋结构 冰荷载 冰激振动 海上平台 

分 类 号：TE951.01[石油与天然气工程—石油机械设备]