海上大型电气平台筒型基础结构浮稳性

Floating Stability of Bucket Foundation of Large Offshore Electric Platform

为探究海上大型电气平台底部新型导管架-筒型基础结构整体湿拖的可行性,借助有限元软件展开浮运过程中吃水深度、波浪高度和波浪周期等因素对基础稳性和动态响应影响规律的研究。结果表明:当筒型基础与导管架结构整体在一定吃水深度下且波浪周期在垂向或纵向固有周期附近时,基础可能产生共振现象;筒型基础自身可为包含导管架结构的整体提供足够的浮稳性;在2m以下波浪高度和5级以下海况条件下,整体结构可进行远距离湿拖浮运。

In order to explore the feasibility of the integrated wet towing of a new jacket-bucket foundation structure at the bottom of the large offshore electric platform,the finite element software is used to study the effects of draft,wave height and wave period on the foundation stability and dynamic response.The results show that:when the whole foundation is at certain draft and the wave period is near the vertical or longitudinal natural period,the resonance phenomenon may occur;the bucket foundation itself can provide sufficient floating stability for the integrated structure including the jacket;under the conditions of wave height below 2mand sea condition below level 5,the integrated structure can be used for long-distance wet towing.