轮罩处前保险杠刚度分析规范

Q/SZJ191001-2017轮罩处前保险杠刚度分析规范SpecificationOfStiffnessAnalysisForFrontFasciaatWheelhouse20XX20XX-09-30实施20XX-08-28发布XXXX汽车工程技术有限公司发布Q/SZXX-X-2017轮罩处前保险杠刚度分析规范范围本标准规定了轮罩处前保险杠刚度分析的分析方法，以确定整车中轮罩处前保险杠刚度。本标准适用于CAE部门轮罩处前保险杠刚度分析。规范性引用文件无。术语和定义无。流程图PROCESSFLOWDIAGRAM建模Model建模ModelMeettarget截取车身CutBIW约束边界Boundary设置参数计算Setparameter结束End优化Optimization图1流程图Figure1ProcessFlowDiagram工具描述TOOLDESCRIPTION仿真分析过程中需要用到的如下软件:Thefollowingsoftwarefacilitatestheanalyticalsimulationprocess:前处理(Preprocessors):Hypermesh求解器(AnalysisCode):nastran101后处理(Postprocessors):HyperView建模和分析过程MODELING/ANALYSISPROCEDURE单位Units分析中所用单位制如下所示:Theunitsusedintheanalysisareasfollows:力(Force) N质量(Mass) Ton长度(Length) mm时间(Time) s内容Contents坐标系CoordinateSystems建模技巧ModelingTechniques建模仅可能使用壳单元模型截取A柱之后1200mm（或者靠近B柱前侧位置），截取模型边界约束1-3自由度ModelusingPlateelements.UsetheportionofthevehicleBIWmodel250MMforwardofthe“A”pillarand1200MMrearwardof“A”Pillar(orjustforwardofthe“B”Pillar).Thecut-offsectionsoftheBIWmodelareconstrainedwithDOF123假设和限制ASSUMPTIONS/LIMITATIONS以上截取的车身刚度等同整车刚度阻尼对分析无影响Theportionofthevehicledescribedaboverepresentsthevehiclestiffness.Dampingforcesareinsignificanttothisanalysis.约束和边界条件CONSTRAINTS/BOUNDARYCONDITIONS约束截取车身模型处边界1-3自由度ConstrainthecutsectionsofthebodymodelwithDOF123.图2边界约束Fig2Boundarycondition载荷LOADS在前轮罩边缘角的往上一排，往前一排的那个单元抓取一个RBE2，然后在该RBE2主点加载Y向20N的载荷。Apply20Ncrosscarloadoveranelementlocatedonerowaboveandonerowforwardofthefasciacorner.Placeanodeinthecenteroftheelement.AttachthenodewithanRBE2totheelement’scorners.ApplytheLoad.图3载荷Fig3Loadcondition性能要求PERFORMANCEREQUIREMENTS刚度大于K=20N/mmFasciaStiffnessatWheelHouseEdgeforInboardLoad:Thestiffnessmustbe20N/mmorgreater.分析要求ANALYSISREQUIREMENTS无。结果RESULTS结果格式ResultsFormatsOP2相关测试