Q/SZJ191001-2017電動助力轉(zhuǎn)向系統(tǒng)旋轉(zhuǎn)剛度分析規(guī)范SpecificationOfRotationStiffnessAnalysisForEPS20XX20XX-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電動助力轉(zhuǎn)向系統(tǒng)旋轉(zhuǎn)剛度分析規(guī)范范圍本標準規(guī)定了電動助力轉(zhuǎn)向系統(tǒng)旋轉(zhuǎn)剛度分析的分析方法，以確定整車中儀表板中的電動助力轉(zhuǎn)向系統(tǒng)的剛度。本標準適用于CAE部門電動助力轉(zhuǎn)向系統(tǒng)旋轉(zhuǎn)剛度分析。規(guī)范性引用文件下列文件對于本文件的應用是必不可少的。凡是注日期的引用文件，僅注日期的版本適用于本文件。凡是不注日期的引用文件，其最新版本（包括所有的修改單）適用于本文件?！墩嘋AE性能目標與方案》。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設置參數(shù)計算Setparameter結(jié)束End優(yōu)化Optimization圖1流程圖工具描述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):nastran101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ModelingTechniquesIP建模僅可能使用殼單元轉(zhuǎn)向管柱下端的附著結(jié)構(gòu)件用剛性單元連接截取BIW，A柱往前250mm，A柱往后1200mm（或者剛到B柱之前）截取的邊界約束123自由度ModeltheentireIPstructureusingplateelements.Usearigidfixturetothelowercolumntostructureattachments.UsetheportionofthevehicleBIWmodel250MMforwardofthe“A”Pillarand1200MMrearwardof“A”Pillar(orjustforwardofthe“B”Pillar).Thecut-offsectionsoftheBIWmodelareconstrainedwithDOF123.圖2分析模型假設和限制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約束截取車身模型處邊界1-3自由度ConstrainthecutsectionsofthebodymodelwithDOF123.載荷LOADS在管柱中心線加載項目指定的扭矩測量加載點的旋轉(zhuǎn)角度從而得出轉(zhuǎn)向機構(gòu)的角剛度Applyaprogramspecifiedtorqueaboutthecolumncenterline.Monitorthenodalrotationaboutthesameaxis.Derivethetorsionstiffnessfortheattachingstructure圖3分析方法性能要求PERFORMANCEREQUIREMENTS需滿足《整車CAE性能目標與方案》轉(zhuǎn)向系統(tǒng)總成及其安裝區(qū)域不產(chǎn)生屈服沿轉(zhuǎn)向柱中心線的扭轉(zhuǎn)剛度是項目指定的剛度《整車CAE性能目標與方案》requirementshouldbemet.TheloadsinducedintothesteeringcolumnassemblyduetotheactuationoftheEPSmotormustresultinnoyieldingoftheattachmentareas.Thetorsionstiffnessalongthecenterlineofthesteeringcolumnaxisisaprogramspecifiedrequirementstiffness分析要求ANALYSISREQUIREMENTS無。結(jié)果RESULTS結(jié)果格式Results