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ID:33013437
大小:3.48 MB
页数:76页
时间:2019-02-19
《数字地面模型的建立与在铁路选线中的应用》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、兰州交通大学硕士学位论文AbstractWitlltherapiddevelopmentofrailway,railwayroutedesign,aSthebaSicworkofrailwayconstruction,hasbecomemoreandmoresignificant.Thedigitalterrainmodel,whichiscloselyconnectedwithrailwayroutedesign,alsohaSachievedgreatdevelopment,duetothegradualdevelopmentofCADinrailwayrouteandcomputert
2、echnology.Asallimportantbasisofmodernizationofrailwayroutedesign,ifthedigitalterrainmodelcarlnotbeverywellappliedinpiacticalengineering,CADinrailwayrouteisdifficultlybrokenthrough,andthetechnologiesofroutesurveyanddesignarealsohardtobeimproved.Therefore,itisnecessarytoconductfurtherresearchesonthea
3、pplicationofthedigitalterrainmodelinrouteengineeringtopromotethedevelopmentofanintegratedsystemofdigitalterrainmodelsandsurveyanddesignofrailwayroute.Thethesisdeeplyinvestigatesthepartialfunctionsoftheprofessionalsoftwareforroutedesignintheintegratedsystemofrailwaysurveyanddesignbyusingcomputergrap
4、hics,computationalgeometry,geometricmodelingandthetheoryofhuman—computerinteraction.Throughtheresearchandestablishmentofthedigitalterrainmodel,thecontourmapsarefinallyproduced,whichareemployedinrailwayroutedesigntoimprovetheefficiency.Topromotetheexactitudeofthedesign,theinternalinterpolateinthedig
5、italterrainmodelisstudied,byanalyzingfactorsinfluenaingitsexactitudeofthemovingfittingmethod,comparingweighedmeansofvariousexactitudes,toimprovethemovingfittingmethodtogetbetterresults.WithVBAtocompiletheprocess,themoduleofthedigitalterrainmodelisproduced.whileMATLABisappliedtospeedcalculationandma
6、keitmoreexact.Basedontherequirementoftheintegrationofrailwaysurveyanddesign,thethesisfocusesontheresearchofthenewtechnologyanditsapplicationofthedigitalterrainmodelinlinedesign,whichismorepractical.Themajorcontentsandstructuresofthethesisarebrieflyintroducedinthefollowingparts:(1)Thispaperstudysdig
7、italterrainmodelconstructiontheoryandDelaunayalgorithm,whichareusedinrailwayroutefield,andthroughthepoint—by—pointjnsert-algorithmtOconstructDelaunayNetwork.Thenthroughtheirregulartrianglenetsgeneratecontou
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