Q/SZJ191001-2017輪罩處前保險杠剛度分析規(guī)范SpecificationOfStiffnessAnalysisForFrontFasciaatWheelhouse20XX20XX-09-30實施20XX-08-28發(fā)布XXXX汽車工程技術有限公司發(fā)布Q/SZXX-X-2017輪罩處前保險杠剛度分析規(guī)范范圍本標準規(guī)定了輪罩處前保險杠剛度分析的分析方法，以確定整車中輪罩處前保險杠剛度。本標準適用于CAE部門輪罩處前保險杠剛度分析。規(guī)范性引用文件無。術語和定義無。流程圖PROCESSFLOWDIAGRAM建模Model建模ModelMeettarget截取車身CutBIW約束邊界Boundary設置參數計算Setparameter結束End優(yōu)化Optimization圖1流程圖Figure1ProcessFlowDiagram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):nastran101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) N質量(Mass) Ton長度(Length) mm時間(Time) s內容Contents坐標系CoordinateSystems建模技巧ModelingTechniques建模僅可能使用殼單元模型截取A柱之后1200mm（或者靠近B柱前側位置），截取模型邊界約束1-3自由度ModelusingPlateelements.UsetheportionofthevehicleBIWmodel250MMforwardofthe“A”pillarand1200MMrearwardof“A”Pillar(orjustforwardofthe“B”Pillar).Thecut-offsectionsoftheBIWmodelareconstrainedwithDOF123假設和限制ASSUMPTIONS/LIMITATIONS以上截取的車身剛度等同整車剛度阻尼對分析無影響Theportionofthevehicledescribedaboverepresentsthevehiclestiffness.Dampingforcesareinsignificanttothisanalysis.約束和邊界條件CONSTRAINTS/BOUNDARYCONDITIONS約束截取車身模型處邊界1-3自由度ConstrainthecutsectionsofthebodymodelwithDOF123.圖2邊界約束Fig2Boundarycondition載荷LOADS在前輪罩邊緣角的往上一排，往前一排的那個單元抓取一個RBE2，然后在該RBE2主點加載Y向20N的載荷。Apply20Ncrosscarloadoveranelementlocatedonerowaboveandonerowforwardofthefasciacorner.Placeanodeinthecenteroftheelement.AttachthenodewithanRBE2totheelement’scorners.ApplytheLoad.圖3載荷Fig3Loadcondition性能要求PERFORMANCEREQUIREMENTS剛度大于K=20N/mmFasciaStiffnessatWheelHouseEdgeforInboardLoad:Thestiffnessmustbe20N/mmorgreater.分析要求ANALYSISREQUIREMENTS無。結果RESULTS結果格式ResultsFormatsOP2相關測試