Q/SZJ191001-2017儀表板剛度分析規(guī)范SpecificationOfStiffnessAnalysisForIP20XX20XX-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儀表板剛度分析規(guī)范范圍本標(biāo)準(zhǔn)規(guī)定了儀表板剛度分析的分析方法，以確定整車中儀表板的剛度。本標(biāo)準(zhǔn)適用于CAE部門儀表板剛度分析。規(guī)范性引用文件無。術(shù)語(yǔ)和定義無。流程圖PROCESSFLOWDIAGRAM建模Model建模Model剛度達(dá)標(biāo)Stiffness？截取車身CutBIW約束邊界Boundary加載Load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):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) N質(zhì)量(Mass) Ton長(zhǎng)度(Length) mm時(shí)間(Time) s內(nèi)容Contents坐標(biāo)系CoordinateSystems建模技巧ModelingTechniquesIP建模僅可能使用殼單元。用剛體模型代替轉(zhuǎn)向管柱。模型截取按照A柱前250mm、A柱后1200mm（或者靠近B柱前側(cè)位置）。截取模型邊界約束1-3自由度。盡量做到如下措施：儀表板支撐板，用集中質(zhì)量代替風(fēng)道和控制塊。HVAC，鼓風(fēng)機(jī)，散熱器等盡量使用殼單元和非結(jié)構(gòu)質(zhì)量描述，也可以使用Rbe3和集中質(zhì)量點(diǎn)建模IP上覆蓋的泡沫等質(zhì)量通過非結(jié)構(gòu)質(zhì)量NSM賦予IP實(shí)際所覆蓋的面積上IP上的內(nèi)飾件比如管道，控制器之類的使用集中質(zhì)量代替ModeltheentireIPstructureusingShellelements.UseaRigidmodeltorepresenttheSteeringColumn.UsetheportionofthevehicleBIWmodel250MMforwardofthe“A”Pillarand1200MMrearwardof“A”Pillar(orjustforwardofthe“B”Pillar).Thecut-offsectionsoftheBIWmodelareconstrainedwithDOF123Ifpossible:ModeltheIPretainertrimpanelanduseconcentratedmassestorepresentventsandcontrols.ModeltheHVAC,BlowerMotor,Radio,andInstrumentclusterascloselyaspossiblewithShellelementsandusedistributedNSMinthePSHELLcard.RBE3sandConcentratedMassmaybeusedtorepresentthesecomponents.ModeltheentireIPretainerusingshellelements.Modelthefoammassasnon-structuralmass(NSM)overtheareaofIPcoveredwithfoam.假設(shè)和限制ASSUMPTIONS/LIMITATIONS以上截取的車身剛度等同整車剛度剛體轉(zhuǎn)向模型不會(huì)影響IP的剛度Thesectionofthevehicledescribedaboverepresentsthevehiclestiffness.UseofarigidcolumnmodelfacilitatesaccurateassessmentoftheIPstructure.約束和邊界條件CONSTRAINTS/BOUNDARYCONDITIONS約束截取車身模型處邊界1-3自由度約束車身前懸置彈簧安裝點(diǎn)1-6自由度Thesectionofthevehicledescribedaboverepresentsthevehiclestiffness.UseofarigidcolumnmodelfacilitatesaccurateassessmentoftheIPstructure.圖2邊界約束Fig2Boundarycondition載荷LOADS在轉(zhuǎn)向管柱頂端中心點(diǎn)橫向縱向1000N的集中載荷ApplyspecifiedconcentratedverticalandlateralforcesattheHubcenterofthesteeringcolumnrepresentation.性能要求PERFORMANCEREQUIREMENTS滿足剛度要求目標(biāo)Meetthetarget分析要求ANALYSISREQUIREMENTSmarks位移測(cè)量點(diǎn)為加載點(diǎn)剛度值=力/加載點(diǎn)位移Determinetheverticaldisplacementatthepointofapplicationofloadontherigidsteeringcolumn.CalculatetheIPstiffness(Stiffness=forceatthepointofapplication/verticaldisplacementatthepointofapplication).輸出文件OutputFiles無。分析時(shí)長(zhǎng)AnalysisDura