车灯（车身）Gload分析规范

Q/SZJ191001-2017车灯(车身)Gload分析规范SpecificationofHeadlampGloadAnalysisforVehicle20XX20XX-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车灯（车身）Gload分析规范范围本标准规定了术语和定义、车灯强度的分析及结果处理方法。本标准适用于CAE部门车灯Gload分析。规范性引用文件无。术语和定义、无摘要Abstract本分析规范的目的是为了确定车灯强度。ThepurposeofthisanalysisistodeterminethestrengthoftheHeadlampinthevehicle.流程图ProcessFlowDiagram组建详细模型组建详细模型Collectdetailedmodel(s)求解Solve加载Applyconstraintsandloads输出位移并计算Outputdisplacementandcompute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整车或半车身模型，其中包含车灯灯壳，灯片，集中质量点以及转动惯量。Toafullorhalfvehiclemodel;Includelamphousing,lens,remaininglampmass,andwherenecessarysignificantlampinternals.坐标系CoordinateSystems整车坐标系Globalcoordinatesystem建模技巧ModelingTechniques无。假设和限制Assumptions/Limitations以上截取的车身刚度等同整车刚度。阻尼对分析无影响。Theportionofthevehicledescribedaboverepresentsthevehiclestiffness.Dampingforcesareinsignificanttothisanalysis.载荷和边界条件Loads/BoundaryConditions约束X向从A柱后面截取车身模型，Y向从原点处截取半车身模型，其中X向截取车身节点处约束1-3DOF，Y向截取半车身节点处约束2,4,6DOF。与灯相连接零部件连接点用RBE2模拟，约束1-3DOF。与车身相连的连接点用RBE2模拟，约束1-3DOF。车灯用CONM2单元模拟包含转动惯量信息，车灯质量在质心处用RBE3连接到车灯壳上。MultiplenodesSPC’s1-3wherebodyiscutbehindApillar.MultiplenodesSPC’s2,4,6wherebodycutatcenterline.Theattachmentpointsareassumedtoberigid(RBE21-3)connectionsbetweencomponentswithinthelampassembly.Attachmentstothebodystructureareassumedtoberigid(RBE21-3)connections.ThemassoftheheadlampshouldberepresentedusingaCONM2massattheCGofthelampwiththeappropriatemomentofinertiavaluesinthemasscard.ThemassisdistributedwithaRBE31-6atCGtothehousingRBE31-3.图2边界约束示意图Fig2BoundaryconditionDisplay载荷LOADSX、Y方向分别加载5G,Z向加载10G5GLoadCaseinX;5GLoadCaseinY;10GLoadCaseinZ结果Results性能要求PerformanceRequirements最大应力小于屈服应力的90%。Maximumstressforthefollowingloadcasesshouldbelessthan90%