Q/SZJ191001-2017側(cè)門后視鏡安裝點(diǎn)剛度分析規(guī)范SpecificationOfDoorMirrorMountingSurfaceStiffnessAnalysis20XX20XX-06-30實(shí)施20XX-05-29發(fā)布XXXX汽車工程技術(shù)有限公司發(fā)布Q/SZXX-X-2017側(cè)門后視鏡安裝點(diǎn)剛度分析規(guī)范范圍本標(biāo)準(zhǔn)規(guī)定了側(cè)門后視鏡安裝點(diǎn)剛度分析方法及結(jié)果處理方法。本標(biāo)準(zhǔn)適用于CAE部門側(cè)門后視鏡安裝點(diǎn)剛度分析。規(guī)范性引用文件無。術(shù)語和定義無流程圖ProcessFlowDiagram建模建模BuildFEmodel設(shè)置邊界條件DefineLoads/boundaryconditions計(jì)算SubmittoNastranorOptistruct處理輸出文件Dealwiththeoutputfiletogettheresults結(jié)果是否滿足要求Istheresultsok?白車身CAD模型BodyinWhiteCADmodel結(jié)束EndYES優(yōu)化OptimizationNO圖1流程圖Fig1ProcessFlowDiagram工具描述ToolDescription仿真分析過程中需要用到的如下軟件:Thefollowingsoftwarefacilitatestheanalyticalsimulationprocess:前處理(Preprocessors):Hypermesh求解器(AnalysisCode):MSC.Nastran后處理(Postprocessors):Hyperview建模和分析過程Modeling/AnalysisProcedure單位Units分析中所用單位制如下所示:Theunitsusedintheanalysisareasfollows:力(Force) 牛頓(N)質(zhì)量(Mass) 噸(Ton)長度(Length) 毫米(mm)時(shí)間(Time) 秒(Second)內(nèi)容Contents白門，包括鉸鏈，不包含玻璃，內(nèi)飾，如圖2所示。白門總成：門內(nèi)板門外板防撞梁腰線加強(qiáng)板框架加強(qiáng)板局部加強(qiáng)板鉸鏈鉸鏈加強(qiáng)板鎖扣加強(qiáng)板焊點(diǎn)粘膠Doorinwhite(DIW)withhingeassembly,noglassandtrim.Themodelisshowninfigure2.Door-in-whiteassembly:DoorinnerDoorouterDoorbeamBeltlinereinforcementsFramereinforcementsLocalreinforcements(ifany)HingereinforcementsHingeassemblyLatchreinforcementSpotweld(s)orfastener(s)Adhesive/gumdrop(s).圖2側(cè)門有限元模型Figure2SidedoorFEAModel坐標(biāo)系CoordinateSystems整車坐標(biāo)系Globalcoordinatesystem建模技巧ModelingTechniques網(wǎng)格質(zhì)量要求，基準(zhǔn)網(wǎng)格尺寸為5mm，最小尺寸為3mm，最大尺寸為8mm，翹曲小于15°，雅克比大于0.6，三角形比例小于5%，螺栓孔需要增加一圈washer，螺栓采用RBE2單元模擬，點(diǎn)焊及鉚接采用ACM(shellgap)類型模擬，鉸鏈轉(zhuǎn)軸采用RBE2+CBAR（放開軸向轉(zhuǎn)動）單元模擬。Meshqualityrequirement,.Thetargetsizeis5mm,theminsizeis3mm,themaxsizeis8mm.Warpage<15deg,.Jocobin>0.6.Triangleselement<5%.Addonewasherforboltholes.BoltsuseRBE2elementtosimulate.WeldsandrivetsuseACM(shellgap)typetosimulate.ThehingeaxisesuseRBE2+CBARelementtosimulate.假設(shè)和限制Assumptions/Limitations假設(shè)Assumptions與物理試驗(yàn)相比較，對于焊點(diǎn)焊縫失效和材料局部撕裂的地方，分析模型假設(shè)沒有焊點(diǎn)焊縫失效和材料撕裂。對于螺紋連接處，假設(shè)分析模型沒有螺紋失效。Incomparisonwiththephysicaltest,wherespotweldsmailfailandmaterialmaylocallytear,theanalyticalmodelassumesnoweldsfailureandnomaterialtear.Tothescrewingconnection,theanalyticalmodelassumesnoscrewingfailure.限制Limitations無。載荷和邊界條件Loads/BoundaryConditions約束Constraints:約束車門鉸鏈安裝點(diǎn)123456自由度，約束車門鎖扣點(diǎn)123456自由度。如圖3所示。Constraints1-6doffrdoorhingesandlatch.(asshowninfigure3).圖3約束figure3Constraints加載Loads：車門后視鏡安裝點(diǎn)與后視鏡質(zhì)量中心點(diǎn)（A）點(diǎn)相連。在后視鏡中心點(diǎn)（A）點(diǎn)分別加載局部坐標(biāo)系下X\Y\Z三個(gè)方向300N的力（見圖4）。ModelDIWandrepresentmirrorwiththreerigidlinksconnectingthecenterpoint(“A”)onthemirrorplaneandthemirrorattachmentlocatiosonthemirrormount(DIW).Apply300NeachinX\Y\ZdirectionsatpointA.separatelyindifferentloadcasesatlocalcoordinatesystem(asshowninfigure4.)圖4加載Fig4Loads結(jié)果Results輸出加載點(diǎn)對應(yīng)的X、Y或Z方向的位移，計(jì)算剛度值。OutputdisplacementsatalltheloadingpointsinX,YandZdirections.Calculatethestiffness(load/deflection).計(jì)算公式Computation：K式中：d——加載點(diǎn)位移。ThedeflectioninattheLoadingPoint.性能要求PerformanceRequirements前側(cè)門FrontD