背门气撑杆强度（关闭状态）分析规范

背门气撑杆强度（关闭状态）分析规范SpecificationofLiftgatePowerLoadingStrength(Closed)Analysis20XX20XX-XX-XX实施20XX-XX-XX发布XXXX汽车工程技术有限公司发布背门气撑杆强度（关闭状态）分析规范范围本标准规定了术语和定义、背门气撑杆强度（关闭状态）分析方法及结果处理方法。本标准适用于CAE部门的背门气撑杆强度（关闭状态）分析。规范性引用文件无。术语和定义无。摘要本规范规定了关闭状态下后背门气撑杆强度分析的流程与要求。ThespecificationprovidesthestiffnessanalysisprocessandrequirementsforliftgatePowerLoading(Closed).流程图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建模和分析过程单位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)内容整备门，如图2所示。FullytrimmedLiftgate.Themodelisshowninfigure2.FullytrimmedLiftgateassembly:Liftgate-In-White,Glass,Hinge,Latch,Lumpedmass.Liftgate-In-Whiteassembly:• Allliftgatestructuralparts• Adhesive• Mastic• Welds• Mechanicalclinches图2车门有限元模型Fig2DoorFEAModel坐标系约束铰链时用全局坐标系，约束锁扣时采用局部坐标，局部坐标见图3。Constraintthehingeatglobalcoordinatesystem，constraintthelatchatlocalcoordinatesystem,thelocalcoordinatesystemisshowninfigure3.图3局部坐标示意图Fig3LocalCoordinateSystem建模技巧无。假设和限制本规范仅用于静态线性分析Theprocedureisapplicableonlytostaticlinearanalysis载荷和边界条件约束Constrains：约束铰链车身端安装点123456自由度，约束锁扣处局部坐标系下3自由度，约束缓冲垫法向自由度，如图4所示。Constraints1-6dofatthebodysidehinges,constrained3dofatthelatch,asisshowninfigure4.加载Loads：工况一：施加重力；辅助气撑杆气撑力；动力气撑杆开启力；工况二：施加重力；辅助气撑杆气撑力；动力气撑杆关闭力；工况三：施加重力；辅助气撑杆气撑力；动力气撑杆开启逆反力；工况四：施加重力；辅助气撑杆气撑力；动力气撑杆关闭逆反力，如图4所示；Subcase1:Gravity;GasStrutForceatnominal(sidewithoutpowerstrut);Normaloperatingload,openingforce;Subcase2:Gravity;GasStrutForceatnominal(sidewithoutpowerstrut);Normaloperatingload,closingforce;Subcase3:Gravity;GasStrutForceatnominal(sidewithoutpowerstrut);Reversalload,openingforce;Subcase4:Gravity;GasStrutForceatnominal(sidewithoutpowerstrut);Reversalload,closingforce,asisshowninfig