Q/SZJ191001-2017翼子板倚靠強(qiáng)度分析規(guī)范SpecificationofStrengthAnalysisforFenderLeaning20XX-20XX-XX-XX實(shí)施20XX-XX-XX發(fā)布XXXX汽車(chē)工程技術(shù)有限公司發(fā)布Q/SZXX-X-2017翼子板倚靠強(qiáng)度分析規(guī)范范圍本標(biāo)準(zhǔn)規(guī)定了汽車(chē)翼子板倚靠強(qiáng)度的分析方法及要求。本標(biāo)準(zhǔn)適用于CAE部門(mén)汽車(chē)翼子板倚靠強(qiáng)度的分析。規(guī)范性引用文件無(wú)。術(shù)語(yǔ)和定義無(wú)。摘要Abstract本規(guī)范規(guī)定了翼子板倚靠強(qiáng)度分析的流程，包括建模要求，邊界條件，載荷和結(jié)果評(píng)價(jià)等。Thespecificationprovidesthestrengthanalysisflowforfenderleaning，containsmodelingrequirements，boundarycondition，loading,resultevaluationandsoon.流程圖ProcessFlowDiagramYesYesNo創(chuàng)建/翼子板模型更新Set/updatefendermodel施加載荷和約束Load&constrain提交計(jì)算Submitcomputer結(jié)果是否滿足要求？TheresultisOK？結(jié)束End優(yōu)化Optimization圖1流程圖Fig1ProcessFlowDiagram工具描述ToolDescription仿真分析過(guò)程中需要用到的如下軟件:Thefollowingsoftwarefacilitatestheanalyticalsimulationprocess:前處理(Preprocessors):Hypermesh求解器(AnalysisCode):Nastran/OptiStruct后處理(Postprocessors):HyperView建模和分析過(guò)程Modeling/AnalysisProcedure單位Units分析中所用單位制如下所示:Theunitsusedintheanalysisareasfollows:力(Force) 牛(N)質(zhì)量(Mass) 噸(Ton)長(zhǎng)度(Length) 毫米(mm)時(shí)間(Time) 秒(Second)內(nèi)容Contents分析模型包括翼子板，連接支架，粘膠和焊點(diǎn)等，模型如下圖2所示：MODELCONTENT?Fenderandbrackets(Includes:Allstructuralparts,adhesive,mastic,welds,mechanicalclinches.)圖2翼子板有限元模型Fig2FenderFEA坐標(biāo)系CoordinateSystems整車(chē)全局坐標(biāo)系。Vehicleglobalcoordinatesystem.建模技巧ModelingTechniques緩沖塊和密封條使用彈簧單元模擬，焊點(diǎn)使用ACM單元模擬，螺栓使用CBAR單元模擬。網(wǎng)格質(zhì)量要求，翹曲小于12°，雅克比大于0.6，局部應(yīng)力區(qū)域沒(méi)有三角形單元，關(guān)鍵安裝點(diǎn)周?chē)鷽](méi)有三角形單元，模型三角形單元數(shù)量小于10%Meshqualityrequirements,Averageelementsizeis3to8mm,Warpage<12,Jacobin>0.6,Notrianglesinlocalstressarea,notriangularelementsaroundkeyfixpoints,Triangleselement<10%,Addonewasherforboltholes.Bumperandsealcanbesimulatedwithspring.BoltusesRBE2+Cbarelementtosimulate.SpotusesACMtypetosimulate.假設(shè)和限制Assumptions/Limitations假設(shè)Assumptions與物理試驗(yàn)相比較，對(duì)于焊點(diǎn)焊縫失效和鈑金局部撕裂的地方，分析模型假設(shè)沒(méi)有焊點(diǎn)焊縫失效和鈑金撕裂。Incomparisonwiththephysicaltest,wherespotweldsmailfailandmaterialmaylocallytear,theanalyticalmodelassumesnoweldsfailureandnomaterialtear.限制Limitations材料線性屬性被賦予翼子板模型。linearmaterialpropertiesareassignedtothefendermodel.載荷和邊界條件Loads/BoundaryConditions約束Constrain車(chē)身側(cè)連接點(diǎn)約束1-6DOF；Constrainthemodelasfollows:BodyattachmentpointsSPC1-6DOF.Constrainthemodelasfollows:圖3載荷和邊界Fig3Load&BoundaryConditions載荷Load在顧客容易倚靠的200*400mm的區(qū)域，施加300N側(cè)向分布載荷。Loadthemodelasfollows:Applya300Nlateralloaddistributedoveranarea(200x400mm),onthesideofthewhereacustomercouldlean.結(jié)果Results在Nastranop2結(jié)果文件中輸出位移，應(yīng)力OutputdisplacementandstressinNastranop2resultfile性能要求PerformanceRequirements最大應(yīng)力小于材料屈服極限，剛度大于