第39卷第11期压力容器2022年11月doi:■■■■■■■■■■■■■■■■■■■■10.3969/j.issn.1001-4837.2022.11.006设计计算孔管型支承结构的弹性跟随行为及优化研究李智1,曾晓佳2,莫亚飞1,高付海1,赵守智1(1.中国原子能科学研究院核工程设计研究所,北京102413;2.国防科工局核技术支持中心,北京100070)摘要:孔管型支承结构常见于快堆设备中,如中间热交换器支承和独立热交换器支承,其由于结构局部刚度不连续的特征而存在弹性跟随效应。通过对瞬态冷冲击工况下孔管型支承结构进行热弹塑性分析,验证了该结构存在显著的弹性跟随特征,并提出了通过减少结构强刚性段壁厚的方法减弱弹性跟随效应引起的弹性应力增加和应变集中的不利现象。结果表明:优化后结构弹性分析应力降幅高达62%,塑性分析等效塑性应变降幅高达47.2%。因此在进行核电厂工程结构设计时,基于实际载荷工况组合,需尽量缩小结构局部刚度不连续区的刚度差距,从而规避弹性跟随效应,降低结构内部应力应变,延长结构使用寿命。关键词:快堆;孔管型支承结构;热弹塑性;弹性跟随;应变集中中图分类号:TH49;TL351;O344.3文献标志码:AStudyonelasticfollow-upbehaviorandoptimizationofholetubetypesupportingstructureLIZhi1,ZENGXiaojia2,MOYafei1,GAOFuhai1,ZHAOShouzhi1(1.ChinaInstituteofAtomicEnergy,DepartmentofNuclearEngineeringDesign,Beijing102413,China;2.StateAdministrationofScience,TechnologyandIndustryforNationalDefense,NuclearTechnologySupportCenter,Beijing100070,China)Abstract:Holetubetypesupportingstructureiscommonlyusedinfastreactorequipment,suchasintermediateheatexchangersupportsandindependentheatexchangersupports,whichhaveelasticfollow-upeffectsduetothediscontinuouslocalstiffnesscharacteristicsofthestructure.Inthisstudy,throughtheanalysisofthethermalelastic-plasticresultsoftheholetubesupportstructureunderthetransientcoldshockcondition,itisverifiedthatthestructurehassignificantelasticfollow-upcharacteristics,andthemethodofreducingthewallthicknessofthestrongrigidsectionofthestructurewasproposedtoreducetheunfavorablephenomenonofelasticstressincreaseandstrainconcentrationcausedbytheelasticfollow-upeffect.Theresultsshowthatafteroptimization,thestressred...