基于特征線的鞋樣曲面參數(shù)化技術研究與實現(xiàn).pdf

1、浙江大學碩士學位論文基于特征線的鞋樣曲面參數(shù)化技術研究與實現(xiàn)姓名：吳春福申請學位級別：碩士專業(yè)：機械設計及理論指導教師：陸國棟20040201浙江大學學位論文ABSTRACTTheshoepatternsurfacemodelingisimportanttOshoepatterndesign，eventheshoeindustrySimultaneously，parametricCADisoneoftrendsincomputeraid

2、eddesignOnthebasisoftheanalysisofitsstatusquoandtheproblemsremained，anewshoepatternmethodsurfacemodelingbasedonfeaturelinesisputforwardinthisdissertationwhichcarlsignificantlyimprovetheautomationdegreeandefficiencyofente

3、rprisesThefirstproblemishowtOgeneratethepatternsurfaceaftertheshoelastwasmodeledInchapter2，featurepointsaredetectedbasedontheessentialcharactersofthelast；featurelinesaregeneratedaccordingtothefeaturepointsatthefirstThena

4、nalgorithmtodetectspecialregiondividedbythefeaturelinesispresentedAtlast，shoelastsurthceisslicedandtriangulatedbythefeaturelinesTodeveloptheefficiencyoftriangulation，analgorithmtOdeterminingtheConvexo—concaveverticesofpo

5、lygonbytopologicalmappingisputforwardParametricdesignhasbeenahotspotintheareaofCADtechnologyParametricdesignisextendedtohigh—levelentitiesthatinclude3Dcurveand3Dsurfacetosolvetheparametriceditingshoepattemsurfaceononelas

6、tsurfaceinthechapter3TheGeometricConstraintGraph(GCG)ofthefeaturelinesareestablishedautomaticallyinthefirst，thenallalgorithmtosolvetheGCGbasedonConstraintReasoningandGraphTheoryispresentedAfterallconstraintsaresatisfied，

7、theshoepatternsurfaceisregeneratedbynewfeaturelinesOneofthebasicproblemsofShoeCADishowtOreusetheoutstandingpatternsdesignedbythedesigner，SOthechapter4extendstheparametricdesigntechnologyteusetheshoepattemonvariouslastsAm

8、ethodtosolvethisproblemviathefollowingaspects：andtopologicalunhomeomorphouslastsThetopologicalunhomeomorphouslastscanbeconvertedtothetopologicalhomeomorphouslastsviatopologicalequivalenttransformationfirst，thenthefeature