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2393(())():,,2004,23(9)3135,,,,(1);(2),,,;(3);(4),,,,,,,,,,,,,,q=(qx,qy,qz),,,divq=5qx5x+5qy5y+5qz5z=0(1)q:q=-ý=-55x,55y,55z(2)(1)(2):div=(-ý)=-55x55x-55y55y-55z55z=0(3),Laplace1,2:V:ý2=525x2+525y2+525z2=0S1:=0()S2:55n=-1f()()(4)S1;S2;f()j3257061,;:(0546)8391944133:V:52T5x2+52T5y2+52T5z2=0(5),Laplace,,4,,,,,(3)Laplace,1,5,;,,f()j,j,,,f(),,,1,1,(),211,,(),,,6(1)(is)(S)(I0)I0=Sis(6)(2)(RT)RT=2D1(7),m;D1,m(3)(RW)(4)(R)[6],22(tmD,DnL):R=2Lln2LD4t+3L4t+L(8)L,m;D,m;t,m(tmL),(8):R=2Lln2LD(9)(5)(R)R=RT+R+RW(10)(6)(U)U=I0R+(11)2320042V(7)U,U,,yj=U-I0(R+RW)-(12)2,(,),,55n2=0(13)3[7]ii=I2rr2-a2(14)ia,mA/m2;a,m;r,m;I,A[5],x,x:iy=i0(1+ky2)(15)y,a=yr;r,m;k;i0,mA/m21(1),(2),(3)(4),28,95m;200m(0.251mm)1500kg/m3,()2200kg/m3(C0.5%),7830kg/m3,2.25106m-1;(C4%),7270kg/m3,1.15107m-131,2,68,-0.55VNACERP0169(1996)SYJ36-89BS7361,Cu/CuSO4850mV;100mV;-1.1-1.2V,-0.85V-0.65-0.3V,e,:=0+e(16),,,,5mA/m2,6mA/m2,10mA/m2,510mA/m2,6mA/m24(MN)(B)(3),100m,100m,50m,40m,12mm,YJB3SiCr2501000(20),30m,20m3(1),,,(2),,45(4)33239:4,,(-0.852-1.2V),,,(BN),(1)1(V)(100,0)(95,0)(96,0)121212A3-1.086-0.889-1.239-1.168-1.136-1.069A5-1.000-0.797-1.184-0.973-1.070-0.937A7-0.937-0.729-1.079-0.928-0.987-0.909O-0.930-0.786-1.083-0.983-0.980-0.966C3-0.966-0.771-1.100-0.974-1.016-0.951C5-0.920-0.724-1.075-0.945-0.990-0.864C7-0.891-0.691-1.014-0.937-0.941-0.871(96,0),20mA7A35,A1A5A2A6675A7A3(100,0),(A7OA3)(1)86A1A57A2A68(1)4320042393():,,2004,23(9)3537,,,,,,,,,,,,,,2000m3,,14.3m,14.5m,,,,,8%,(2),,,,0.221V(3),,0.082V,0.194V(4)TC,tTC,;tTC,A3OA71,:,,1996,16(2)29352,:,,1999,11(2)3,:,(),19984,:,(),19845,:,,1998,19(7)6,:,(),19997,:,(),19988,,:(),(),19989,W.M.:,(),1985(:2003208215):3414014,;:(0730)849205653,1969,1994(),,1974,1998(),2003(),,,1966,1988(),,1971,1993(),(),,,1974,2002(),(),1968,1991(),2000(),,(),1970,1993,,1964,1986,,1979,2001()(),,,1966,1989,(),1966,1991,,1970,1993,,1962,1998,20048,1966,1995,,1957,19851999,,1972,1997,,1969,1992,,1956,1996,,,,1953,1982,16239ismadeandseriouscorrosioncanbeseenatthelocationoftopplateandupperwallplate.Analysisresultsshowthatthecorrosionisgalvaniccorrosionbysaltyatmosphere,aqueousvaporandhydrogensulfidecontainedindieseloil.Thecontrolmeasuresareputforward,includingzincandaluminumsprayingpluscoatingmaterialsontopplateandwallplate.SubjectHeadingsthydrodesulphurizeddieseltank,corrosion,controlmeasuresSHIYongchun,MAWenhaietal:CorrosionControlMethodofPipelineSupports,OGST,2004,23(9)2830.Thispaperseekstosolvethatthecorrosionoccurredonpipelinesupportsismoreseriousthanotherpartswhicharenotanyspecialty.Thisisapartcorrosionfrequentlyoccurredandbeingserious,andisaseriouslyhiddendangerinsafety,becauseitisdifficulttoobserve,maintainandrenew,andeasytobeignored.Threenewsupportstructuredesignstocontrolthecorrosionareputforward,whichcansolvethecorrosionproblem.SubjectHeadings:pipeline,support,corrosionanalysis,corrosioncontrol,methodDESIGN&CALCULATIONMAWeiping,ZHANGGuozhongetal:NumericalModelingofDeepwellAnodetoCathodicProtectionofBottomPlateofTank,OGST,2004,23(9)3135.Basedontheheatfluidenergyequationandthecathodicprotectionmathematicsmodelcontrollinge-quation,thetankbottomcathodicprotectionmathem-aticsmodelofthedeepwellanodeisestablished.Consideringtheasymmetryofthesoilmedium,imposingthetwoclassicalcurrentdensityhypothesis,theprotectivepotentialisobtained,gettotheconclusionthat:(1)thetwoprotectivepotentiallawsareresemble;(2)Thebiggestdifferenceofthetankbottomprotectivepotentialliesinhorizontalaxes,forthesingletankandsingledeepwellanode,theminimumofprotectivepotentialliesinthecertainpointofhorizontalaxes,notthecenterofthetank;(3)theverticalpotentialasymmetryislargerthanthatofthehorizontalanddiagonal;(4)lyinginacriticalanodedepth,theinfluenceofthedepthtotheintimateregionislargerthanthatofthecenteranddistanceregion.Employingthemethod,thecaseofthemulti-tanksandmulti-deep-wellanodescanbestudiedinordertoaccuratelycalculatethedifferenceofthetankbottomprotectivepotential.SubjectHeadings:heatflowfield,mathematicsmodel,cathodicprotection,assistantanode,protectivepotential,currentdensityCONSTRUCTIONTECHNIQUECHENZhipingandHEYoujun:IntegralMovementTechniqueonLarge-scaleTankwithHydraulicLiftMethod,OGST,2004,23(9)3537.Comparedwiththecommonintegralinstallationandsectionalcuttingmethodtomoveoiltank,thehydraulicliftmethodtomoveintegrallylarge-scaleoiltankischaracterizedbyshortinstallationperiod,lowcostandeasytoinstall.Thispaperintroducesthemovingstepsofthismethod,theinstallationexperienceisusefultothesamemovementofoiltank.SubjectHeadings:oiltank,integralmovementtechnique,applicationWANGYu,BAOChenglinetal:ComprehensiveCommissioningTechnologyfortheEast-sectionPipelineof4
本文标题:深井阳极对储罐底板阴极保护的数值模拟
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