Q/SZJ191001-2017前保險杠（系統(tǒng)）模態(tài)分析規(guī)范SpecificationOfModalAnalysisForFrontFasciaComponent20XX20XX-09-30實施20XX-08-28發(fā)布XXXX汽車工程技術(shù)有限公司發(fā)布Q/SZXX-X-2017前保險杠（系統(tǒng)）模態(tài)分析規(guī)范范圍本標準規(guī)定了前保險杠（系統(tǒng)）模態(tài)分析的分析方法，以確定整車中前保險杠的模態(tài)。本標準適用于CAE部門前保險杠（系統(tǒng)）模態(tài)分析。規(guī)范性引用文件無。術(shù)語和定義無。流程圖PROCESSFLOWDIAGRAM建模Model建模ModelMeettarget約束邊界Boundary設(shè)置參數(shù)計算Setparameter結(jié)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):nastran103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(zhì)量(Mass) Ton長度(Length) mm時間(Time) s內(nèi)容Contents坐標系CoordinateSystems建模技巧ModelingTechniques前保險杠建模僅可能使用殼單元所有與車身接附點的連接都用rbe2（約束自由度1-3）模擬，rbe2主點約束1-6自由度模型中必需包括前霧燈模型Forfoglampsintegratedwithinthefascia,includearepresentativehousingafoglampmass.ModelthefrontfasciacomponentusingPlateelements.MultiplenodesSPC’s1-6,areusedtogroundthecomponentwhereassemblywouldbemountedtothebody.Theattachmentpointsareassumedtoberigid(RBE21-3)connectionsbetweencomponentswithinthefasciaassembly.假設(shè)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前保險杠的車身接附點約束1-6自由度MultiplenodesSPC’s1-6,areusedtogroundthecomponentwhereassemblywouldbemountedtothebody.ViewfromupViewfrombottom圖2邊界約束Fig2Boundarycondition載荷LOADS無。性能要求PERFORMANCEREQUIREMENTS第一階整體蒙皮模態(tài)大于35Hz，第一階整體格柵模態(tài)大于30Hz,第一階整體前霧燈模態(tài)大于39Hz質(zhì)量大于1Kg的附件一階模態(tài)大于30Hz1stglobalfasciaresonantfrequencyisgreaterthan30Hz，1stfasciaintegratedgrilleresonantfrequencyisgreaterthan30Hz，1stfasciaintegratedfoglampresonantfrequencyisgreaterthan39Hz分析要求ANALYSISREQUIREMENTS無。結(jié)果RESULTS結(jié)果格式ResultsFormatsOP