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ID:33134729
大小:17.24 MB
页数:77页
时间:2019-02-21
《反应堆压力容器金属o形密封环的数值模拟与试验分析》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、万方数据浙江~1.业大学硕士学伉沦文NumericalsimulationandexperimentalstudyofRPVmetal0一ringABSTRACTReactorPressureVessel(RPV)innuclearpowerplantsISnotonlyanimportantequipmentofthecoolantpressureboundaryforprimarycircuit,butalsooneofthemostcriticalcomponentsinnuclearpowerplantsanditisfeaturedbyitshightemperatur
2、e,highpressureandstrongradiation.Comparedwiththefatiguefailure,bucklingfailureandcrackingfailureofRPV_sealingfailureisamoreconTfflOflfailuremode.ThedesignandmanufactureofthesealbetweenRPVheadcoverandvesselflangeisoneofthekeytechnologiestoguaranteethatnoradioactivematerials1eakintherunningandt
3、estingproccssesofRPV;inotherwords,thesealingperformanceofRPVdirectlydecideswhetherthenuclearreactorcanbestartedornot.111t11epresentpaper.metalO-typesealringsusedinCAP1400nuclearreactorpressurevesselweretakenandtestswereconductedtostudythecompressionresiliencecharacteristicsofInconel718alloytu
4、bes,theinfluenceofsilvercoatingonitsdeformationcharacteristicswerealsoanalyzed.Theelastic—plasticnumericalsimulationswereconductedtohelpanalyzethedeformationcharacteristicsofOringusingFEMsoftwareABAQUSandsomekeyfactorsinfluencingthesealingabilityofOringwerestudied;forexample,theinfluenceofcom
5、pressionratio.sizesofthetubefincludingsectiondiameterZwallthicknessfandouterdiameterD】andinstallationgrooveclearanceontheresiliencevalueandlinearpressureofO-typeringwerestudied.FEMresultsshowedthatcornpressionratioaffectedthe1inearpressureofO—typeringsinitsworkingprocessanddecideditSresilienc
6、eability:whencompressionratiowasintherangeof15%~20%,enoughlinearpressureandprettyhighresilienceperformancecouldbegot.ThesizeoftubesaffectedthepressuredistributiononthecontactareaanditnotonlyinfluencedtheresiliencevalueandlinearpressuregreatlybutalsocausedthecollapseofO-typeringinthemiddleofth
7、econtactarea.Forinstallationgroovespossessingacertalnsideclearance,linearDressurecouldbeimprovedby13.1%andresiliencevaluealsobeincreased.Besides,whenO—typeringcontactedwiththesidewall,asecondarysealcouldbeachievedandthecollapseofO..typeringca
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