Q/SZJ191001-2017后保險(xiǎn)杠（車身）模態(tài)分析規(guī)范SpecificationOfModeAnalysisForRearFascia(Vehicle)20XX20XX-09-30實(shí)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后保險(xiǎn)杠（車身）模態(tài)分析規(guī)范范圍本標(biāo)準(zhǔn)規(guī)定了后保險(xiǎn)杠（車身）模態(tài)分析方法及結(jié)果處理方法。本標(biāo)準(zhǔn)適用于CAE部門后保險(xiǎn)杠（車身）模態(tài)分析。規(guī)范性引用文件無。術(shù)語和定義無。摘要ABSTRACT本分析規(guī)范的目的是為了分析后保險(xiǎn)杠在整車中的模態(tài)性能。Thepurposeofthisanalysisistoanalyzethemodalperformanceofrearfasciainvehicle.流程圖ProcessFlowDiagram建模建模Model1stmode>25Hz截取車身CutBody約束邊界Boundary設(shè)置參數(shù)計(jì)算Setparameter結(jié)束End優(yōu)化Optimization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模型為含后保險(xiǎn)杠的半車身或者整車模型Rearfasciamountedonthefullorhalfvehiclemodelmustusedforthisanalysis坐標(biāo)系CoordinateSystems整車全局坐標(biāo)系。Vehicleglobalcoordinatesystem.建模技巧ModelingTechniques無假設(shè)和限制Assumptions/Limitations無載荷和邊界條件Loads/BoundaryConditions約束Constrains：約束車身截取處1-6DOF，車身與后保險(xiǎn)杠系統(tǒng)之間連接用RBE2（約束1-3DOF），與車身連接的結(jié)構(gòu)和車身之間用RBE2（約束1-3DOF）。theconstraintsonthetranslationDOFonlyonthepartialvehiclemodelshownbelow,Theattachmentpointsbetweencomponentsareassumedtoberigid(RBE21-3),connectionsbetweencomponentswithinfasciaassembly,Attachmentstothebodystructureareassumedtoberigid(RBE21-3)connections.加載Loads：無圖2邊界約束Fig2Boundarycondition結(jié)果Results無性能要求PerformanceRequirements后保險(xiǎn)杠一階模態(tài)大于25Hz，霧燈整體模態(tài)大于35Hz。1stRearFasciaglobalresonantfrequencyis>25Hz,1stfasciaintegratedfoglampresonantfrequenc