Q/SZJ191001-2017懸架控制臂剛度分析SpecificationOfStiffnessAnalysisForSuspensionControlArm20XX20XX-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懸架控制臂剛度分析范圍本標(biāo)準(zhǔn)規(guī)定了懸架控制臂剛度分析的分析方法及結(jié)果處理方法。本標(biāo)準(zhǔn)適用于CAE部門(mén)懸架控制臂剛度分析。規(guī)范性引用文件無(wú)。術(shù)語(yǔ)和定義無(wú)。摘要Abstract本規(guī)范描述了懸架控制臂剛度分析流程，僅針對(duì)于用于長(zhǎng)短臂和麥弗遜的前后懸架三角類型的上下控制臂。這種控制臂用于通過(guò)球鉸與外側(cè)的懸架轉(zhuǎn)向節(jié)相連，通過(guò)襯套與內(nèi)側(cè)的車架/副車架/車體相連。Thisprocedureoutlinesananalyticaltechniqueforevaluatingthestiffnessperformanceofsuspensioncontrolarms.Thisprocedureislimitedtotriangular-typeloweranduppercontrolarmsusedinconventionalShort-LongArm(SLA)andMacPhersonStrutfrontandrearsuspensions.Thesearmstypicallyconnectontheoutboardsidetoasuspensionknucklethroughaballjoint,andontheinboardsidetotheframe/sub-frame/bodystructurethroughrubberbushings.圖1擺臂（控制臂）模型流程圖收集控制臂收集控制臂設(shè)計(jì)信息ObtainDesignInformationforControlArm是否得到預(yù)定效果DoesmodelachievedesiredPerformance?建模BuildFEAModel線性分析PerformLinearStaticAnalysis后處理ReviewResults結(jié)束Stop否NO是Yes圖2流程圖Fig2ProcessFlowDiagram工具描述ToolDescription仿真分析過(guò)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(guò)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(zhǎng)度(Length) 毫米(mm)時(shí)間(Time) 秒(Second)內(nèi)容Contents模型包括控制臂和零長(zhǎng)度彈簧單元Themodelshouldincludeafiniteelementrepresentationofthecontrolarm.Zero-lengthspringelementsarerequiredtorepresentthebushings坐標(biāo)系CoordinateSystems整車坐標(biāo)系?？刂票垡r套也可以使用局部坐標(biāo)系。Thefiniteelementmodelshouldbeconstructedintheglobalvehiclesystem.Controlarmbushingarefrequentlyorientedincoordinatesystemsotherthantheglobalcoordinatesystem.建模技巧ModelingTechniques網(wǎng)格質(zhì)量應(yīng)按照建模規(guī)范執(zhí)行。對(duì)于鈑金件，建議使用線性的四邊形或三角形單元（NASTRANCQUAD4&CTRIA3）；對(duì)于鑄件和機(jī)加件，建議使用二次四面體單元（NASTRANCTETRA10）。Withregardstomeshquality,thefiniteelementmodelshouldmeetguidelinesoutlinedinfiniteelementmodelingguidelines.Itissuggestedthatstampedsheetmetalpartsbemodeledusinglinearquad&trielements(NASTRANCQUAD4&CTRIA3).Itisalsosuggestedthatcastandmachinedpartsbemodeledusingparabolictetrahedralelements(NASTRANCTETRA10)假設(shè)和限制Assumptions/Limitations除剛體單元外，其它均使用線性材料的單元Allstructuralelements,exceptforrigidcomponents,aregivenlinearmaterialdefinitionsusingstandardmaterialproperties;載荷和邊界條件Loads/BoundaryConditions約束Constraints通常有兩種約束方式：襯套接地約束；慣性釋放。注意當(dāng)采用第二種方式時(shí)，必須同步所有連接處的載荷。如果是使用預(yù)測(cè)載荷，必須與襯套剛度同時(shí)更新（而第一種方式不需要這么做，因?yàn)橐r套已經(jīng)包含在模型中了）。Ingeneral,themodelcanbeconstrainedinoneoftwoways:Constraincontrolarmthroughbushingstoground.InertiareliefNotethattousemethod#2thatsimultaneousloadsmustbeavailableforallinterfacepointsofthecontrolarm.Ifusingpredictedloads,newloadsmustbecalculatedwheneverbushingrateschange.(Thisisnotrequiredforthefirstmethod,sincethebushingsthemselvesareincludedintheFEmodel).圖3約束載荷Loads加載單位力Aunitloadisuse