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ID:36456144
大小:2.46 MB
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时间:2019-05-10
《具有特殊肋骨型式的耐压壳体强度与极限承载能力分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第9卷第2期中国舰船研究Vol.9No.22014年4月ChineseJournalofShipResearch中国舰船研究Apr第.20149卷doi:10.3969/j.issn.1673-3185.2014.02.006期刊网址:www.ship-research.com网络出版地址:http://www.cnki.net/kcms/doi/10.3969/j.issn.1673-3185.2014.02.006.html具有特殊肋骨型式的耐压壳体强度与极限承载能力分析刘培婧,刘均,陈杰,程远胜华中科技大学船舶与海洋工程学院,湖北武汉430074摘要:基
2、于ANSYS有限元分析软件对具有装配型和宽扁型2种特殊肋骨型式的耐压壳体进行强度与极限承载能力分析。针对装配型肋骨的耐压壳体,对比其与传统加筋圆柱壳的强度特性,分析其在不同载荷下的应力分布,以及肋骨与壳体之间的装配间隙对极限承载能力的影响;针对宽扁型肋骨的耐压壳体,分别采用体单元和壳、梁单元进行有限元模拟,分析2种建模方式下结构强度及极限承载能力计算结果的差异性。计算结果表明:具有装配型肋骨的耐压壳体,外载荷与结构应力之间存在非线性关系,装配间隙越小,极限承载能力越强;具有宽扁型肋骨的耐压壳体,2种建模方式对其强度结果有一定的影响,而对极限承载能力的结果影响不
3、大。关键词:耐压壳体;装配型肋骨;宽扁型肋骨;强度;极限承载能力中图分类号:U663.7文献标志码:A文章编号:1673-3185(2014)02-30-07StrengthandUltimateCarryingCapacityAnalysisofCylindricalShellswithSpecialRibsLIUPeijing,LIUJun,CHENJie,CHENGYuanshengSchoolofNavalArchitectureandOceanEngineering,HuazhongUniversityofScienceandTechnology,W
4、uhan430074,ChinaAbstract:Inthispaper,thestrengthandultimatecarryingcapacityofcylindricalshellswithassem⁃bly-typeribsandwithflatribsarecalculatedrespectivelyusingthefiniteelementmethod.Thedifferenceinstrengthbetweenthesetwotypesofshellsisstudied.Thestressresponsesatthreetypicalpositi
5、onsontheshellwithassembly-typeribsarecalculatedfordifferentloads,andtheeffectoftheassemblygapontheultimatecarryingcapacityisalsoanalyzed.Then,forthecylindricalshellwithflatribs,thedifferenceofstrengthandultimatecarryingcapacityresultsbyusingdifferentmodelingmethodsareinvestigated.Si
6、m⁃ulationresultsshowthatthenon-linearityrelationshipbetweenthepressureandstresscanbeclearlyob⁃servedforthecylindricalshellwithassembly-typeribs;specifically,thesmallertheassemblygapis,thelargertheultimatecarryingcapacitybecomes.Meanwhile,forcylindricalshellswithflatribs,theeffectofc
7、omputationalmodelingonstrength,eitherbeingSolidelementsonlyorthecombinationofSshellandBeamelements,isquiteobvious,whilethatontheultimatecarryingcapacityisnegligible.Keywords:pressureshell;assembly-typerib;flatrib;strength;ultimatecarryingcapacity[1]静水压力的作用下,有多种可能的破坏模式。0引言对于环肋加强的耐压壳体
8、结构强度和极限承载能[2][3]耐压壳
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