CAJ | 학술논문

对于深水系泊钻井系统而言,移动式海洋钻井装置与细长结构(系缆、钻井隔水管)之间的耦合效应在预测浮体运动及钻井隔水管响应时起决定性作用.文中建立了深水系泊钻井系统的全耦合有限元模型,考虑波频与低频环境载荷,对系统进行了非线性时域分析.分析表明,由低频浮体运动激励的低频隔水管动态响应可对深水钻井隔水管设计产生重要影响.常规方法将低频浮体运动作为准静态效应考虑,对于连接在锚泊钻井装置上的深水钻井隔水管而言是不精确的.
대우심수계박찬정계통이언,이동식해양찬정장치여세장결구(계람、찬정격수관)지간적우합효응재예측부체운동급찬정격수관향응시기결정성작용.문중건립료심수계박찬정계통적전우합유한원모형,고필파빈여저빈배경재하,대계통진행료비선성시역분석.분석표명,유저빈부체운동격려적저빈격수관동태향응가대심수찬정격수관설계산생중요영향.상규방법장저빈부체운동작위준정태효응고필,대우련접재묘박찬정장치상적심수찬정격수관이언시불정학적.
For a deepwater moored drilling system, the coupling effects between the mobile offshore drilling unit (MODU) and the slender structures (mooring lines and drilling riser) are of primary im-portance in prediction of the floater motions as well as the drilling riser response.In this paper,a ful-ly coupled finite element (FE) model of the moored drilling system was established and used in the following non-linear time-domain analysis considering irregular wave frequency (WF) and low fre-quency (LF) environmental loading. The analysis indicates that the LF riser dynamics excited by LF floater motions are of crucial importance for the riser design.Traditional approach considering LF floater motions as a quasi-static effect is inaccurate for a deepwater drilling riser attached to a moored MODU.