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1、基于優(yōu)化思想的多成分系泊纜靜力特性分析第32卷第10期2010年10月艦船科學(xué)技術(shù)SHIPSCIENCEANDTECHNOLOGYVo1.32,No.10Oct.,2010基于優(yōu)化思想的多成分系泊纜靜力特性分析張火明,張曉菲,楊建民(1.中國(guó)計(jì)量學(xué)院計(jì)量測(cè)試工程學(xué)院,浙江杭州310018;2.上海交通大學(xué)海洋工程國(guó)家重點(diǎn)實(shí)驗(yàn)室,上海200030)摘要:以一工作水深為320m的轉(zhuǎn)塔式浮式生產(chǎn)存儲(chǔ)系統(tǒng)(FPSO)為例,研究了多成分系泊纜索靜力特性計(jì)算方法.基本思路是,首先基于一維優(yōu)化思想(本文選取黃金分割法和懸鏈線方程方法)計(jì)算出每種類型錨泊線的水平張力一水平跨距
2、曲線,以離散點(diǎn)的形式給出;然后依次給出上端系纜點(diǎn)水平移動(dòng)距離,相應(yīng)計(jì)算每根錨泊線新的水平跨距;再根據(jù)這些新的水平跨距在對(duì)應(yīng)的一曲線中插值求出此時(shí)的每根錨泊線水平張力,將其向軸正方向投影,合成后即得上端系纜點(diǎn)移動(dòng)后的系泊系統(tǒng)方向水平恢復(fù)力.對(duì)垂直方向的恢復(fù)力和單根纜索張力計(jì)算的方法與此類似.相應(yīng)計(jì)算結(jié)果與Dynfloat軟件結(jié)果吻合得很好.本文方法簡(jiǎn)單直觀,容易理解,并且省時(shí),通常完成1次計(jì)算所需時(shí)間小于1s,特別適合于需要多次迭代計(jì)算復(fù)雜系泊系統(tǒng)靜力特性的等效水深截?cái)嘞到y(tǒng)優(yōu)化設(shè)計(jì).關(guān)鍵詞:海洋平臺(tái);系泊系統(tǒng);靜力特性;懸鏈線方程;優(yōu)化技術(shù),中圖分類號(hào):P75;
3、TP309文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1672—7649(2010)10—01l4—08DoI:10.3404/j.issn.1672—7649.2010.10.029Staticcharacteristicanalysisofmulti-componentmooringlinebasedonoptimizationthinkingZHANGHuo—ming,ZHANGXiaofei,YANGJian—ming(1.CollegeofMetrologyTechnologyandEngineering,ChinaJiliangUniversity,Hangzhou3
4、10018,China;2.StatekeyLaboratoryofOceanEngineering,ShanghaiJiaotongUniversity,Shanghai200030,China)Abstract:Inthispaper,aturretmooredFPSOinwaterdepthof320misselectedtoinvestigatethecomputationmethodofstaticcharacteristicsofmulti—componentmooringline.Thebasicideacanbedescribedas~llow
5、s.Firstly,basedontheone—dimensionaloptimizationthinking,namelythegolden-sectionmethodinthispaper,andthecatenaryequationmethod,thecurveofhorizontaltensionTn—horizontalspanXofasinglemooringlineofeverytypeofcableiscalculatedandtheresultsareexpressedindiscretepoints.Secondly,thehorizont
6、altransferdistanceofthetoppointispresentedinturntocalculatethecorrespondingnewhorizontalspanofeverymooringline.Thirdly,throughnumericalinterpolationinthecorrespondingTH—Xcurveaccordingtothenewhorizontalspan,thehorizontaltensionofeverymooringlinecanbecalculated.Fourthly,toprojectTHat
7、directionofandtointegrateitastotal,thehorizontalrestoringforceonthetoppointatdirectionXofthemooringsystemcanbeget.Thecalculationoftheverticalrestoringforceaswellasthetoppointtensionofsinglemooringlineissimilartothatmentionedabove.TheresultsarecomparedwiththosefromDynfloatandtheagree
8、mentisverygood.Them
