自由曲面网格结构的网格划分技术分析

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1、万方数据浙江大学硕士学位论文AbstractInrecentyears，alotoffree-formarchitecturesappearedinmanycities，bringinginsplendidvisualeffect．Anurgentproblemcomesalongwithit，that’Showtomeshthesechangeablefree-formstructurestoshowitsaestheticsimplications．Traditionalspatialstructurechangeslessinthearchitec

2、turesurface，SOthere’realwayssomepopularmeshingschemes．Butfortherisingfree-formstructures，nopopularmeshingschemesisavailable，foritschangeablearchitecturesurface．So，meshingmethodforarbitraryfree-formstructureshasbecomingaproblemtobesolvedimminently．Advancingfronttechniquestartswith

3、agivenboundarymesh，namingfront，andthencreatesoneintemalelements，andupdatethefront，aslongasthefrontisnotempty．AccordingthebasicprocessingofAFT,thispaperbringsupamethodwhichdividesacurvewithanapproximatelength．Withthismethod，themeshisobtained．Takingdemandsofarchitecturegridintocons

4、ideration，everycandidateelementisgradedandthebestischosentobetheadvancingelements．Free-formsurfaceadvancingfronttechniqueaimingatmeshingarchitecturegridisestablishedanditspracticabilityandreliabilityaretestifiedbypracticalengineeringandartificialarchitecturesurface．ThesoulofArchi

5、tecturemustbepresentedbyarchitecturegn’ds，Accordingtowhich，thefree．formsurfacemeshingbasedonguidelineisputforward．Theguidelineisapre‘drawncurveonthesurface，guidinggridtrend．It’Smorehelpfultochooserejectedcurvesinsurfaceparameterdomaintopresentcurveswhichareonthesurface．Translatio

6、nmethod，offsetmethodandscalemethodareraiseduptoprocesstheguidelineSOthattheguidelinewillcoverthesurface，whichfoundsgridbydividingandlinking．Anewmethodnamedtwoguidelinesandtwoendverticesisputforwardtomeetthedemandthatgirdsizechangeswiththesurface．Meritsofdifferentprocessingmethoda

7、repointedoutandaccuracyandapplicabilityareprovedbypracticalengineeringandartificialarchitecturesurface．It’Shardtogetsatisfyinggirdonlybymeshing，andoptimizationisneeded．Accordingtoresearchstatusofarchitecturegirdoptimization，localoptimizationisraisedupinthispaper．Gridsthatshouldbe

8、optimizedarechosentobeoptimizedbyoptimal