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StressAnalysisandStrengthEstimationofFlashVesselsThedesignruleofflashvessels,whichisacylindricalshellattachedtoacurvedtubewithrectangularsectionhavenotbeenestablished.Thestrengthestimationforthetypicalflashvesselsbasedonstressanalysisby3D2finiteelementmethodispresentedinthispaper.:1,[1],,,,,,,145,,,,,,(,,,,,:(1)8Wilson[23](2)[245](3)[5],;,,Wilsion,42,,2211WilsonWilson[23],LaeLe:u=Nae+GAe(1),,NG[45]GAe,,Ae,,aeAe,:KeuuKeuaKeAuKeAAaeae=peupea(2)Keuu,Peu,KeuA=KeAu,KeAA,PeA[4,5](2):Ae=(KeAA)-1[PeA-KeAuAe](3)(2),Ae,AeKeAe=Pe(4)Ke=Keuu-Keua(Keua)-1KeAu(5)Pe=Peu-Kuua(Keua)-1PeA(6),820,2ö5212Wilson[23],(),,1(a)16(b)1(b)1(a)16xyz=16i=1Nixiyizi,uvw=16i=1Niuiviwi+5i=1GiAiBiCi(7)xi,yi,ziui,vi,wiNi,;Ni(i=1,2,,16)16,[2,5];Ai,Bi,Ci(i=1,2,5),Gi,[4,5]52x-i,y-i,z-iu-i,v-i,w-i:x-i=12(xi-xi+4)x-i+4=12(xi+xi+4),u-i=12(ui-ui+4)u-i+4=12(ui+ui+4)(i=1,2,3,4,9,10,11,12)(8)y-i,z-i,v-i,w-i:i=1,2,3,4,9,10,11,12,(x-i+4,y-i+4,z-i+4),(u-i+4,v-i+4,w-i+4);(x-i,y-i,z-i)(),(u-i,v-i,w-i),:xyz=16i=1N-ix-iy-iz-i,uvw=16i=1N-iuiviwi+5i=1GiAiBiCi(9)N-i,16Ni:N-i=Ni-Ni+4N-i+4=Ni+Ni+4(i=1,2,3,4,9,10,11,12)(10):(1),,,,(2),(),(3)[45]u-i,:u=u-i+u-i+4,u=u-i+4-u-i(i=1,2,3,4,9,10,11,12)(11)213816,,,,,,,:816(2)216N=-12,6,10,14,3,78,16,2,6,10,14,3,7,[5]6236,,,,,8Wilson,1,3(a,b,c),1000,10000Pentium100Mhz(16Mb)1:O1BE2(3)RtRv4(a,b,c)ÉÊË;4a,4b,4cO2AF,5HDG,6,,(3(a)C),,63Sm=123MPa1,No.6,p(MPa),Di(mm)pm724(a),(b),(c)(3(a)A56);pl(A)(3(b)B);(pl+pb)C(3a);(pi+pb+Q),(3aD)4,6,4mm,(146)821123(MPa)185(MPa)185(MPa)369(MPa)No.p(MPa)Di(mm)pmplpl+pbpl+pb+Q1111613721071171602912111610667417791612514631116914751575151291494115312801111112582635114911389219921916219661151113815115126637241153128066118016174174611511138921992191621964,11..,199221Bathe,K.J.Wilson,E.L..NumericalMethodsinFiniteElementAnalysis.Prentice-Hall,Inc.,197631Wilson.E.L.etal..IncompatibleDisplacementModels,NumericalandComputerMethodsinStruc2turalMechanics,AcademicPress,197341...,,1982;2:929851.,,1997:,,(23)11..,,198821..,199731..,,199241..,,199551..,,199561ZhengwangZhenhuazhang.AStrainRangePar2tioningMethodunderMultiaxialStressState.De2velopmentsinTheoreticalAppliedMechanics,1996,VolumeXVË71ZhengwangZhenhuazhang.AStudyoftheHighTemperatureLowCycleFatigueintheMultiaxialStressState.DevelopmentsinTheoreticalAppliedMechanics,1996,VolumeXVË81..,,199691..,1995101.2125Cr21Mo.,,1998111.2125Cr21Mo.,,1999121.,,1997;1021099219993Lr;LrLrLrLr315Ni315Ni,,,1000m3,,,715,,07MnNiCrMoVDR1500m3,07MnNiCrMoVDR,,,,,,,,,,:,,,B31.G,,,,,1828,