Q/SZJ191001-2017翼子板車燈安裝點(diǎn)剛度分析規(guī)范SpecificationOfLampInterfaceStiffnessAnalysisForFender20XX20XX-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翼子板車燈安裝點(diǎn)剛度分析規(guī)范范圍本標(biāo)準(zhǔn)規(guī)定了翼子板車燈安裝點(diǎn)剛度分析方法及結(jié)果處理方法。本標(biāo)準(zhǔn)適用于CAE部門翼子板車燈安裝點(diǎn)剛度態(tài)分析。規(guī)范性引用文件無。術(shù)語和定義無。流程圖ProcessFlowDiagramYesYesNo翼子板FEA模型FenderFEAModel靜力分析StaticAnalysis結(jié)果是否滿足要求？TheresultisOK？結(jié)束End優(yōu)化Optimization翼子板CAD模型FenderCADModel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該模型主要包括翼子板和安裝支架Thismodelmaincontainfenderandbracket坐標(biāo)系CoordinateSystems整車全局坐標(biāo)系。Vehicleglobalcoordinatesystem.建模技巧ModelingTechniques網(wǎng)格質(zhì)量要求，平均單元尺寸3-8mm，翹曲小于12°，雅克比大于0.6，局部應(yīng)力區(qū)域沒有三角形單元，關(guān)鍵安裝點(diǎn)周圍沒有三角形單元，模型三角形單元數(shù)量小于10%，增加一圈washer在螺栓孔上。螺栓用Rbe2+Cbar單元模擬，焊縫用Penta焊縫類型模擬，簡化結(jié)構(gòu)用Rbe3+Mass模擬。Meshqualityrequirements,Averageelementsizeis3to8mm,Warpage<12,Jacobin>0.6,Notrianglesinlocalstressarea,Notriangularelementsaroundkeyfixpoints,Triangleselement<10%,Addonewasherforboltholes.BoltusesRbe2+Cbarelementtosimulate.WeldusesPentatypetosimulate.SimplestructureusesRbe3+Masselementtosimulate.假設(shè)和限制Assumptions/Limitations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.載荷和邊界條件Loads/BoundaryConditions約束Constrains：約束車身連接處1-6自由度，如圖2。Constrain1-6dofatthebodyattachmentpoints,asshownfigure2.加載Loads：在車燈安裝點(diǎn)位置沿法向加載50N（兩個(gè)工況）如圖3所示。Applya50Nloadnormaltotheheadlampmountingsurface（2loadcase）asshownfigure3.圖2翼子板約束模型Fig2FenderConstrainsModel圖3翼子板加載模型Fig3FenderLoadsModel結(jié)果Results輸出*.fem;*.bdf;*.dat等格式的文件Output*.fem,*.bdf,*.dat,.ect.formatfiles結(jié)果讀取加載點(diǎn)加載方向位移，計(jì)算剛度值（F/X）。Determinetheverticaldeflectionmeasuredloadpoint，Calculatethestiffness(load/deflection).性能要求PerformanceRequirements