Q/SZJ191001-2017前地板上的中通道模態(tài)分析規(guī)范SpecificationOfModalAnalysisForFrontFloorConsole20XX20XX-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前地板上的中通道模態(tài)分析規(guī)范范圍本標(biāo)準(zhǔn)規(guī)定了前地板上的中通道模態(tài)分析的分析方法，以確定整車中前地板上的中通道的第一階模態(tài)。本標(biāo)準(zhǔn)適用于CAE部門前地板上的中通道模態(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截取車身CutBIW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(biāo)系CoordinateSystems建模技巧ModelingTechniques建模使用殼單元截取一個帶console的車身模型Modelconsolemountingbracketryandplastichousingusingshellelements.Acquireabodymodelsotheconsolecanmounttoit.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取一個整車模型去除前機(jī)艙和A柱。約束邊界1-6。去除前圍板和一部分后地板，約束邊界1-6。去除Z向300-400以上高度的所有單元，約束邊界1-6Startwithafullvehiclebodymodel.RemoveforwardandverticalofFrontBodyHingePillar.ApplySPC’sof123456atthisedge.Removedashpanels.CuttheBodyInWhitemodelwherefloorpanandrearfloorpanjoin.ConstrainthisedgewithSPC’sof123456.Cutmodelabout300to400mmverticallyonbpillar.ConstrainthisedgewithSPC’sof123456.Constrainthefrontedgeofthefloorpan.Thiswillisolatetheconsolemodeswhendoingthemodalanalysis.Seefigurebelow.圖2邊界約束Fig2Boundarycondition載荷LOADS計算模態(tài)Formodalanalysisontheconsolemodel,useNASTRANSolution103.性能要求PERFORMANCEREQUIREMENTS第一階整體模態(tài)大于35Hz質(zhì)量大于1Kg的附件一階模態(tài)大于35HzConsole總成第一階模態(tài)大于35HzThefrequencyofallrigidbodymodesofnon-isolatedcomponents>1kg,astestedinthevehicle,shallbe>35Hztheconsoleassemblymodalrequirementis35Hz性能要求PERFORMANCEREQUIREMENTS無。分析要求ANALYSISREQUIREMENTS無。結(jié)果RESULTS結(jié)果格式Results