大型整体锥壳与分瓣圆弧锥壳的承载能力计算与比较

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化 工 设 置 与 管 道 第50卷第 4期锥壳结构实际上是将锥壳承载转化成了圆柱壳承载，所以在大型工程结构中具有推广价值。

参 考 1] 淡勇，李会强，李俊菀，等 .基于ANSYS的锥柱壳连接区[2][3]域加强结构的应用 [J].西北大学学报，2010，40(1)：77-80。

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Load-carrying Capability Calculation and Comparison of W hole-coneShell and Split-arc-cone ShelZHENGWei，QIAN Caifu(Colege ofMechanical and Electrical Engineering Beijing University ofChemical Technology，Beo'ing 1 00029，China)Abstract：In this paper，load·-carrying capabilities of a whole-cone shell and a split·-arc·-cone shell were calculated by using finiteelement software ANSYS and were compared with each other.Results showed that the load·-carying capability of the split-arc-coneshel is much larger than that of the whole-cone shel1.With increasing the apex angle of cone，the load-carrying capability of thewhole-cone shel is remarkably decreased，but that of the split-arc-cone shell is not afected.The later is determined by the radius ofthe arC.It seems that split-arc-cone shell is worth to be applied in large engineering structures。

Keywords：cone shel；arc-cone shel；load-carrying capability；finite element analysis(上接第 ll页)8 郭崇志，郑彬 .基于 Shel单元的压力容器结构安全与性能评价 [J].石油机械，2009，37(1)：73.77。

[9 李兆峰 .奥氏体不锈钢应变强化低温容器的安全性研究 [D。

[10] 万力，陶伟明，吴莘馨，等 .由初始几何缺陷引起的薄壁压力容器在内压作用下的局部非线性屈曲 [J].核动力工程，2004，25 (5) ：434-438。

11] 王海龙，王义亮，梁帅 .ANSYS子模型法在非线性分析中的应用 [J].机械工程师，2012(9)：41-42。

[13] 张彤，汤国伟，殷雅俊 .薄壁压力容器在内压作用下的弹塑性屈曲行为研究 [J].压力容器，2010，27(3)：17-25。

Application of Sub--M odel Technique in Nonlinear Analysis of Cold-StretchingProcess of Austenitic Stainless Steel-made Pressure VesselsBAI Long，JIANG Nan，LI Weijun(1.ResearchLaboratoryofChemicalMachineryandSafetyEngineeringSouthChhaUniversityofTechnology，Guangzhou 510640，China，"2.GuangdongInstituteofSpecialEquipmentInspectionShundeBranchInstitute，Shunde 528300，China)Abstract：Torispherical ends of strain hardening vessels may experience localized buckling under strengthening pressure.In thetraditional FEA of heads，the head and partial cylinder are always selected as the research object，while in a nonlinear analysis theseting of boundary is not accurate enough.This paper applies a new technique to set the boun dary more accurately.In addition，onetype of imperfection，irregular thickness of kn uckle，which is more likely to OCCur in production，is introduced.After checking theperformance ofhead un der strengthening pressure，it was concluded that localized buckling will not occur in the kn uckle，even in thezone which sufers imperfection，as long as the minimum fabrication thickn ess is larger than the design thickn ess。

Key words：Sub-model；nonlinear；cold stretching；thickn ess imperfection；localized buckling