哈尔滨工程大学学报
哈爾濱工程大學學報
합이빈공정대학학보
JOURNAL OF HARBIN ENGINEERING UNIVERSITY
2015年
1期
104-108
,共5页
系泊系统%系泊钢缆%剩余强度%安全系数评估%环境等级评估%环境极值预报%极端海况%FPSO
繫泊繫統%繫泊鋼纜%剩餘彊度%安全繫數評估%環境等級評估%環境極值預報%極耑海況%FPSO
계박계통%계박강람%잉여강도%안전계수평고%배경등급평고%배경겁치예보%겁단해황%FPSO
mooring system%mooring wirerope%residual strength%safety factor assessment%typhoon class assess-ment%environment extreme value forecasting%extreme sea conditions%FP SO
针对近年极端海洋性气候频发所导致的FPSO系泊系统安全性问题，从服役多年系泊系统钢缆的剩余强度入手，评估影响船体运动的环境参数，给出系泊钢缆的安全系数。利用准静态的方法估算环境等级的范围，选取南海某型FPSO建立系泊系统耦合计算模型。应用AQWA?DRAFT与AQWA?NAUT模块，采用时域非线性方法对系泊系统进行耦合分析，在满足规范系数的前提下确定现服役系泊系统的定位能力，预报系泊系统所能承受的最大风浪流极值组合及对应的台风等级。通过计算可看出钢缆强度的下降直接影响着系泊系统的定位能力，导致其无法抵御百年一遇的台风，系泊系统可抵御台风等级降至12级。
針對近年極耑海洋性氣候頻髮所導緻的FPSO繫泊繫統安全性問題，從服役多年繫泊繫統鋼纜的剩餘彊度入手，評估影響船體運動的環境參數，給齣繫泊鋼纜的安全繫數。利用準靜態的方法估算環境等級的範圍，選取南海某型FPSO建立繫泊繫統耦閤計算模型。應用AQWA?DRAFT與AQWA?NAUT模塊，採用時域非線性方法對繫泊繫統進行耦閤分析，在滿足規範繫數的前提下確定現服役繫泊繫統的定位能力，預報繫泊繫統所能承受的最大風浪流極值組閤及對應的檯風等級。通過計算可看齣鋼纜彊度的下降直接影響著繫泊繫統的定位能力，導緻其無法牴禦百年一遇的檯風，繫泊繫統可牴禦檯風等級降至12級。
침대근년겁단해양성기후빈발소도치적FPSO계박계통안전성문제，종복역다년계박계통강람적잉여강도입수，평고영향선체운동적배경삼수，급출계박강람적안전계수。이용준정태적방법고산배경등급적범위，선취남해모형FPSO건립계박계통우합계산모형。응용AQWA?DRAFT여AQWA?NAUT모괴，채용시역비선성방법대계박계통진행우합분석，재만족규범계수적전제하학정현복역계박계통적정위능력，예보계박계통소능승수적최대풍랑류겁치조합급대응적태풍등급。통과계산가간출강람강도적하강직접영향착계박계통적정위능력，도치기무법저어백년일우적태풍，계박계통가저어태풍등급강지12급。
The extreme marine weather occurs frequently in recent years, which imperils the safety of floating, pro?duction, storage and offloading( FPSO) mooring system. Aiming at this problem, the paper starts from the analysis of the residual strength of mooring ropes in service for many years, assesses the environment parameters that influ?ence the ship motion and provides the mooring rope's safety factor. The quasi?static method is used to assess the scope of environment grade and an FPSO system on the South China Sea is chosen to build the computation model for the coupling of mooring system. Applying the AQWA?DRAFT and AQWA?NAUT modules to do coupling analy?sis of the mooring system by nonlinear method in time domain, ascertaining the station keeping ability on the prem?ise of satisfying the coefficient stipulated in code, forecasting the combination of extreme wind, wave and current that the mooring system can bear, and the corresponding typhoon class. Through the calculation, it showed that re?duction of mooring line strength directly influences the mooring system’ s positioning capability, so that it could not bear the typhoon of a?hundred?year return period, and the typhoon class is reduced to twelve that the mooring sys?tem can bear.
