管壳式换热器换热管稳定性问题研究

1,2,3(11,100084;21,100013;31,100101):GB1511999JB47321995,:(GB151),ncr(2),:;;:TQ05115:A:1001-4837(2007)03-0008-04AResearchonTubesBucklingProblemofTubularHeatExchangersXUEMing-de1,XUFeng2,LIShi-yu3(11DepartmentofEngineeringMechanics,TsinghuaUniversity,Beijing100084,China;21ChinaSpecialE2quipmentInspection&ResearchCentre,Beijing100013,China;31SINOPECEngineeringIncorporation,Bei2jing100101,China)Abstract:ThetubebucklingisanalyzedasalonetubebythetraditionalmethodandasanelasticsystembyFEM.Twodifferentmechanicalmodels,inwhichthetubesheetisattachedwithorwithoutanunperforatedrim,areanalyzedbytraditionalmethod.Fourtypesofthefixedheatexchangersarecalculated.Theresultsobtainedbydifferentmethodsarecomparedasfollows:thecriticalbucklingpressuresobtainedfromtwodiffer2entmechanicalmodelsbotharecalculatedbytraditionalmethod;thecriticalbucklingpressuresobtainedfromelasticsystembyFEMandfromalonebucklingtubebythetraditionalmethod.Thedesignruleinthestan2dardGB1511999,whichdefinesthesafetycoefficientof2,istooconservativebecauseitdoesntconsiderthecontributionoftheunperforatedrim.Therefore,amoreeconomicalsafetycoefficientof1.5issuggestedbythisthesis.Keywords:tubularheatexchangers;buckling;tubeaxialstress1,(GB1511999)[1]TEMA[2]ASME[3],crncr,8©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.()()GB151,ncr,,JB47321995[4]22(t)min,crncr:-(t)mincrncr(1)(t)min:(1)JB4732[4],,[4](5-72);(2)GB151[1],,Rt=R,[1]27t211[57],,([8])()()()(),,,,,,JB4732[4]5-3,GB151,[9]:(1);(2),Eb=EG=;(3),,Rt=R,Vt=VR,Mt=MR,GB151212,:cr=2Et20(l/i)2(2)i=14d2+(d-2St)2i0,,[1]32,,0:015,017,1,GB151JB4732,ncr=2,:-(t)min[]cr=cr/2(3)21314K,GB151JB4732,21K2RStnL/lcr(mm)/()16137380012ª2520193624745860/146427110/116261424198960010ª1920191574386000/150027410/410351033137680012ª2520193624745860/146463210/215261442149960012ª2520189082535860/146463210/2152614,,JB4732GB1519243172©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(MPa)Pc(MPa)Pa(MPa)mGB151JB47321a11041020153301070-5123314-410b110181230144601015-3912612-3516c-21006-9126015090104813151019-715d-21006-2315014520101947154017-10122a410161330145001056-15111311-1016b410411750138501022-61191919-4815c-5118-23177014170103924171916-1916d-5118-49119013780101971155715-26133a21081030125101044-715612-514b210241100117801015-3917918-3210c-31134-14146012180103015171216-1118d-31134-30156011780101447193718-15134a21061330120301029-419219-312b2102019601146010087-3713-118-2818c-31076-10197011790102031015810-518d-31076-251600114601008742183510-0183:a:Ps,;b:Ps,();c:Pt,;d:Pt,()3-,,,,,,311ANSYS,,(,)(1):ANSYS(2):,,,1/8,11(3):8,,33EShell93014EpShell93EpShell93EsPipe16Et(4):,x-z,y-z(z)1/2;,(UxUy);,z(5)(c,):::Pa=[4At-n(d-2St)2]Pt4At()Pt:Ptz:F=R2Pt2R+S:Pt(z):F=4(d-St)2Pt31214K,Pt,Ps=0,(1)(2)01CPVTVol24.No32007©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=0,Pt=Pt0,:(JB4732[2]),[2](5-72)t0;:,[1]27t0;,:(Pt)cr=cr|t0|Pt0(4)(2)Ps=0,(Pt)cr44c12341K613734198931376214992m015090143001223011863t019362019157019362018908456cr(MPa)6012311560126012(Pt)cr(MPa)91751291417131218615121725187()(Pt)cr(MPa)18121114171225184:(1)456,,,,,14:3210%,2510%,3511%,4911%,t,t,GB151,,(2)467,,(),K,K,14:4212%,7514%,3514%,04,;-,,(GB1511999),ncr(2),,ncr2115,,:[1]GB1511999,[S]1[2]TEMA1StandardofTubularExchangerManufacturersAsso2ciation[S]1SeventhEdition,19991[3]ASME.ASMEBoilerandPressureVesselCode:RulesforConstructionofPressureVessels.Section-Div.1PARTUHX[S].NewYork:AmericanSocietyofMechanicalEngi2neers,2004.[4]JB47321995,[S].[5],,.[J].,1980,16(2):1-23.[6],,,.[M].:,1987.[7],,,.[J].,1991,8(5):73-79.[8]K.A.Miller.DesignofTubePlatesinHeatExchangers[J].ProceedingsoftheInstitutionofMechanicalEngineers,1952,113:215-231.[9],.[J].,1979,(12):19-33.:2006-06-30:(1940-),,,,:,,:11243172©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.