半轴动响应CAE流程规范

Q/SZJ191001-2017半轴动响应分析规范SpecificationOfDriveShaftResponseAnalysis20XX20XX-12-31实施20XX-11-27发布XXXX汽车工程技术有限公司发布Q/SZXX-X-2017半轴动响应分析规范范围本标准规定了术语和定义、半轴动响应分析方法及结果处理方法。本标准适用于CAE部门半轴动响应分析。规范性引用文件无。术语和定义本规范涉及到的术语及其定义如下：动响应（MFREQ）本分析规范中动响应指模态频率响应，是基于模态计算结果对特定频率的动力学响应分析。摘要Abstract为了保证传动系的性能，半轴的动响应是评价半轴设计的必要项之一。根据半轴实际的安装角度，计算半轴的动态加速度振动响应，使加速度幅值满足设计要求。Inordertosupportthedrivelinefunction,itisnecessarytoevaluatethedriveshaftdynamicresponse,itisimportantthatcomputethedriveshaftvibrationExcitingtheunitforceontheworkinglocationfortheamplitudeofaccelerationmeetingtarget.流程图ProcessFlowDiagram建模建模网格离散模型确认几何清理硬点位置确认网格质量检查实体网格填充硬点连接万向节连接定义材料求解设置提交计算计算结果分析修改网格图1流程图Fig1ProcessFlowDiagram工具描述ToolDescription仿真分析过程中需要用到的如下软件:Thefollowingsoftwarefacilitatestheanalyticalsimulationprocess:前处理(Preprocessors):Hypermesh求解器(AnalysisCode):MSC.Nastran后处理(Postprocessors):Hyperview建模和分析过程Modeling/AnalysisProcedure为保证有限元模型质量，需要对几何数模进行相应的清理，删除掉不影响计算的零件如防尘套等，另外需要确认万向节硬点位置以及半轴前后端花键有效连接位置。Therearemanyclearupforsurfaceandsomesimplifiedmodel,suchasU-jointandsplines.单位Units分析中所用单位制如下所示:Theunitsusedintheanalysisareasfollows:力(Force) 牛顿(N)质量(Mass) 吨(Ton)长度(Length) 毫米(mm)时间(Time) 秒(Second)内容Contents分析模型包括左右半轴及其万向节，如果长半轴有支架，也应该包括半轴支架。如下图2所示:CAEmodelincludedriveshaftsandcrosspin,ifthereisthebracket,itistoo.图2半轴CAE模型Fig2CAEmodelofdriveshaft坐标系CoordinateSystems该分析对坐标系没有特殊要求，为了表达上的一致性，一般采用整车坐标系。Itisn’tspecialrequirementforthecoordinatesystem,butusingthevehiclecoordinatesystem,generally.建模技巧ModelingTechniques为了保证体单元通过求解器检查，需要保证2D的壳单元质量。Checkingshellmeshqualitysupportthesolidmeshquality.假设和限制Assumptions/Limitations随着新材料新技术的发展，FEM需要对一些结构及材料进行假设，但该假设不会很大的影响到CAE的分析结果的可信性。FEMsimplifythestructureandthematerial,itisn’teffecttoCAEresult.假设Assumptions万向节假设CrosspinAssumptions因为没有万向节的真实模型，需要修正万向节内部特性，故假设万向节为十字万向节，万向节内部十字绞为刚性。Withoutthecrosspinstructuredetails,assumptionthecrosspinisrigidity.轴承假设BearingAssumptions假设轴承是刚性的，故支架轴承和半轴用只有旋转自由度的刚性连接。Assumptionthebearingisrigidityandrigidconnectbetweendriveshaftandbracketexceptwhirlfreedomdegree.材料假设MaterialAssumptions假设材料阻尼为模态阻尼，阻尼比为3%。Assumptionthematerialdampdefinemodaldamp，thedampratiois3%.限制LimitationsN/A载荷和边界条件Loads/BoundaryConditions约束constraint基于自由模态的频响分析，不约束边界条件。Thisisfree-freebodymodalfrequencyresponseanalysis.加载Loads激励力为0-2000Hz的单位激励频率。Theunitforcefrom0Hzto2000Hzisexciting.结果Results结果格式ResultsFormats输出的结果文件类型为*.OP2或者*.PCH文件。Theresultfiletypeis*.OP2or*.PCHfile.bendingbendingbendingbending图3半轴加速度响应Fig7Acc_ResponseofDriveshaft性能要求PerformanceRequirementsN/A分析要求ANALYSISREQUIREMENTSN/A参考文件DOCUMENTATIONN/A联系人CONTACTSN/A例子EXAMPLES$$huiqiang.liNASTRANBUFFSIZE=65537NASTRANSYSTEM(86)=0NASTRANSYSTEM(166)=0NASTRANSYSTEM(151)=1NASTRANSYSTEM(319)=1NASTRANSYSTEM(146)=4NASTRANSYSTEM(195)=120NASTRANSYSTEM(205)=40NASTRANSYSTEM(219)=40NASTRANSYSTEM(220)=1NASTRANSYSTEM(221)=40NASTRANSYSTEM(273)=300ASSIGNDB1='DB01.DAT'ASSIGNDBM='DBM.MASTER'ECHOOFFDOMAINSOLVERACMS(PARTOPT=DOF)$$SOL111TIME10000000CEND$TITLE=FREQUENCYRESPONSESUBTITLE=Sol111ECHO=NoneLABEL=YourName&Date$SEALL=ALLSPC=33METHOD=10$SUBCASE1LABEL=LeftdriveshaftDrivingPointFRFinLongitudinalDirectionSET54=238880(YourResponsePtNode)ACCELERATION(PHASE)=54DLOAD=3084$SDAMPING=92FREQUENCY=30$SUBCASE2LABEL=LeftdriveshaftDrivingPointFRFinlateralDirectionSET54=238880(YourResponsePtNode)ACCELERATION(PHASE)=54DLOAD=3085$SDAMPING=92FREQUENCY=30$SUBCASE3LABEL=LeftdriveshaftDrivingPointFRFinVerticalDirectionSET54=238880(YourResponsePtNode)ACCELERATION(PHASE)=54DLOAD=3086$SDAMPING=92FREQUENCY=30$SUBCASE4LABEL=LeftdriveshaftDrivenPointFRFinLongitudinalDirectionSET55=229019(YourResponsePtNode)ACCELERATION(PHASE)=55DLOAD=3184$SDAMPING=92FREQUENCY=30$SUBCASE5LABEL=LeftdriveshaftDrivenPointFRFinlateralDirectionSET55=229019(YourResponsePtNode)ACCELERATION(PHASE)=55DLOAD=3185$SDAMPING=92FREQUENCY=30$SUBCASE6LABEL=LeftdriveshaftDrivenPointFRFinVerticalDirectionSET55=229019(YourResponsePtNode)ACCELERATION(PHASE)=55DLOAD=3186$SDAMPING=92FREQUENCY=30$SUBCASE7LABEL=MiddledriveshaftDrivingPointFRFinLongitudinalDirectionSET56=59865(YourResponsePtNode)ACCELERATION(PHASE)=56DLOAD=3284$SDAMPING=92FREQUENCY=30$SUBCASE8LABEL=MiddledriveshaftDrivingPointFRFinlateralDirectionSET56=59865(YourResponsePtNode)ACCELERATION(PHASE)=56DLOAD=3285$SDAMPING=92FREQUENCY=30$SUBCASE9LABEL=MiddledriveshaftDrivingPointFRFinVerticalDirectionSET56=59865(YourResponsePtNode)ACCELERATION(PHASE)=56DLOAD=3286$SDAMPING=92FREQUENCY=30$$$OUTPUT(XYPLOT)XYPUNCHACCERESP/238880(T3RM)XYPUNCHACCERESP/238880(T2RM)XYPUNCHACCERESP/238880(T1RM)$XYPUNCHACCERESP/229019(T3RM)XYPUNCHACCERESP/229019(T2RM)XYPUNCHACCERESP/229019(T1RM)$XYPUNCHACCERESP/59865(T3RM)XYPUNCHACCERESP/59865(T2RM)XYPUNCHACCERESP/59865(T1RM)$$BEGINBULKPARAM,AUTOSPC,YES$TURNONAUTOSPC(DEFAULT=YES)PARAM,GRDPNT,0$GRIDPOINTWEIGHTGRNERATORWRTBASICCOORDINATEPARAM,WTMASS,1.0PARAM,DBALL,SCRATCHPARAM,DDRMM,-1PARAM,POST,-1$$2345678910DLOAD30841.01.01084DLOAD30851.01.01085DLOAD30861.01.01086RLOAD110842084 120RLOAD110852085 120RLOAD110862086120$DLOAD31841.01.01184DLOAD31851.01.01185DLOAD31861.01.01186RLOAD111842184 120RLOAD111852185 120RLOAD111862186120$DLOAD32841.01.01284DLOAD32851.01.01285DLOAD32861.01.01286RLOAD112842284 120RLOAD112852285 120RLOAD112862286120$$$DA