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ID:32365736
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页数:4页
时间:2019-02-03
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1、节选-ABAQUS帮助文档翻译referenceto:usermanual18.62008-10-1012:5918.6理解自适应网格(adaptivemeshing)自适应网格可以通过移动独立的材料网格(allowingthemeshtomoveindependentlyofthematerial),让你在整个分析过程中即使发生大变形,也能保持高质量的网格。通常自适应网格只移动节点,网格的拓扑并不改变。注意:通常自适应网格多用在Dynamic(动态分析),ExplicitandDynamic(显示动态分析),Temp-disp,Explic
2、it中。定义模型中某个区域采用自适应网格的设置:other-->AdaptiveMeshDomain自适应网格的选项控制设置:Other--〉AdaptiveMeshControls通常,在每一个step中只能有一个自适应网格区域。21.2.1ABAQUS/Standarddefinescontactbetweentwobodiesintermsoftwosurfacesthatmayinteract;thesesurfacesarecalleda“contactpair.”ABAQUS/Standarddefines“self-contac
3、t,”whichisavailableonlyintwo-dimensionalanalysis,intermsofasinglesurface.[ifgtevml1]>
4、etizedbetweenthepointonthemastersurfaceandtheslavenode.Strictmaster-slavecontact在这种关系下,主面的节点可以穿入从面(副面),但副面不可以穿入主面。见下图:[ifgtevml1]>
5、rientationaretakenintoconsideration.TheonlydatathatABAQUS/Standardneedsfromtheslavesurfacearethelocationofitsnodesandthesurfaceareaassociatedwitheachnode;thedirectionoftheslavesurface'snormalisnotrelevantinstrictmaster-slavecontact.Thus,aslavesurfacecanbedefinedasagroupofno
6、des—anode-basedsurface.Generally,themastersurfaceshouldbechosenasthesurfaceofthestifferbodyorasthesurfacewiththecoarsermeshifthetwosurfacesareonstructureswithcomparablestiffnesses.Thestiffnessofthestructureandnotjustthematerialshouldbeconsideredwhenchoosingthemasterandslave
7、surface.Forexample,athinsheetofmetalmaybelessstiffthanalargerblockofrubbereventhoughthesteelhasalargermodulusthantherubbermaterial.Ifthestiffnessandmeshdensityarethesameonbothsurfaces,thepreferredchoiceisnotalwaysobvious.GeneralrestrictionsonsurfacesusedincontactpairsWhencr
8、eatingasurfacethatmaybeusedasamastersurfaceinacontactorinteractionanalysis,thecont
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