侧门垂向刚度分析规范

Q/SZJ191001-2017侧门垂向刚度分析规范SpecificationOfVerticalStiffnessAnalysisForSidedoor20XX20XX-XX-XX实施20XX-XX-XX发布XXXX汽车工程技术有限公司发布Q/SZXX-X-2017侧门垂向刚度分析规范范围本标准规定了前/后门垂向刚度分析的分析方法，以满足设计车的刚度设计需求。本标准适用于CAE部门侧门垂向刚度分析。规范性引用文件无。术语和定义无。流程图PROCESSFLOWDIAGRAM基于工程设计子系统数模有限元模型建模基于工程设计子系统数模有限元模型建模仿真计算材料、属性检查连接检查加载边界约束提取结果，对标子系统最终设计方案确定提出优化方案有限元建模仿真计算提取结果，对标子系统最终设计方案确定达标不达标达标图1流程图

AFEAmodelAFEAmodelbuildingbasedontheengineeringdesignsubsystemCalculateMaterial/PropertycheckLinkcheckConstrainsboundarycondition/loadsToextractionresults,forstandardSubsystemdesignschemeestablishedfinallyPutforwardtheoptimizationschemeAFEAmodelbuildingCalculateToextractionresults,forstandardSubsystemdesignschemeestablishedfinallyMeettargetDonotmeettargetMeettargetFigure1ProcessFlowDiagram

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):Abaqus后处理(Postprocessors):Hyperview建模和分析过程MODELING/ANALYSISPROCEDURE单位Units分析中所用单位制如下所示:Theunitsusedintheanalysisareasfollows:力(Force) N质量(Mass) T长度(Length) mm时间(Time) s应力Mpa内容Contents该模型主要包括车身侧围、门槛梁、纵梁、横梁、地板等，如下图：Thismodelmaincontainsbodysides,dash,rock,rail,crossmembers,floor(maybeomittedbaseduponengineeringjudgment),showinthefollowingfigure坐标系CoordinateSystems整车全局坐标系vehicleglobalcoordinatesystem建模技巧ModelingTechniques车身模型平均单元尺寸为8mmx8mm,螺栓连接采用可rigids单元模拟；缝焊采用rbe2单元模拟;点焊采用acm（shellgap）单元模拟，直径6mm.BIWaverageelementsize:8mmx8mm;Bolts:rigidsSeamwelding:rbe2Spotwelding:shellgapinacm,Diameter=6mm假设和限制ASSUMPTIONS/LIMITATIONSN/A假设Assumptions焊接假设WeldAssumptions：材料假设MaterialAssumptions:几何假设GeometryAssumptions:限制Limitations材料Material材料Nonlinearmaterialpropertiesareassignedtothemodal.约束和边界条件CONSTRAINTS/BOUNDARYCONDITIONS该计算分两种模型，一种是在车身上的（onbody）,另一种是独立的（onfixed）Onbody约束：距离hinge位置X向至少300mm处截取车身,边界约束SPC123456；前门开启150Onbodyconstrains:includetheregionofBIW300mmaboutthehingeaxisinthefore/aft(+/-X)andcrosscardirections(+/-X),spc123456Frontdooropeningin150Onfixed约束：约束带铰链的白车门，铰链安装孔约束SPC123456,前门开启150Onfixedconstrains:constrainwhitedoorwithhinge,constrainthehingeholesspc123456.Frontdooropeningin150载荷LOADS对于两种模型,载荷是一样的.载荷：1、在白车门上加载1倍的重力加速度2、然后继续在锁扣点施加800N的向下的载荷3、卸载至0NLoads：Hereisthesameloadconditiontothetwokindsofanalysis.1、Applyaload(1timeGravityDownward)atdoorinwhite.2、Applyaload(800NVerticalDownward)atlatchlocation.3、reduceto0N性能要求PERFORMANCEREQUIREMENTSN/A分析要求ANALYSISREQUIREMENTS时间历程节点TimeHistoryNodesN/A输出文件OutputFiles仅自重状态下的锁点的Z向位移自重+800N状态下锁点的Z向位移将800N卸载为0N后锁点的Z向残余位移1、deformationonZdirectionatlatchlocationononlygravity2、deformationonZdirectionatlatchlocationononlygravityand800N3、Remnantdeformationonthelatchlocation分析时长AnalysisDurationN/A结果RESULTS车门锁点的Z向位移目标值：自重+800N位移≤8mm，塑性变形≤1mmDeflection,Setandstiffness.DeflectionandpermanentsetaremeasuredattheloadapplicationpointalongtheglobalZ-axisTarget：Gravity+800Ndeformation≤8mm,remnantdeformation≤1mmGravity+800N变形/deformation残余位移/