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ID:49285804
大小:1.43 MB
页数:15页
时间:2020-03-01
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1、Discipline:NVHZP11:PanelMobilityandSwagePatternDefinitionProcedure15.11.07PreparedByAndyBurkeSummaryTheobjectiveofthispresentationisto:•Describethepanelmobilityanalysisprocess.•Describeandrecommendaprocedureforpanelswageoptimisation.•Showtheswageoptimisatio
2、nprocedureappliedtothebodyrearpanel.Copyright©2006AltairEngineering,Inc.Allrightsreserved.2PanelMobilityAnalysis-DescriptionPanelMobilityAnalysis(RES.52.110)●Responsepointsforeachpanelweredefinedattheintersectionofthetracelinesshown.●Localcoordinatesystemsen
3、suredthatthevelocityresponsewasnormaltoeachpanel.●Twoexcitationlocationswereconsidered,verticalfronttowerandreardampertop.PanelResponsePointDefinitionCopyright©2006AltairEngineering,Inc.Allrightsreserved.3PanelMobilityAnalysis-DescriptionTwoloadcasesareused
4、toassessthepanelmobilityofeachpanel:•Verticalloadingofthefrontshocktower•VerticalloadingofthereardamperbracketVelocityresponsesaretakennormaltothepanelatpointsthatformagridatapproximately100mmx100mmspacing.Thisgridcanbesmallerorlargerdependingonthesizeofthe
5、panel.Measurementpointsareapproximately100mmawayfromtheboundaryofthepanel.Example:RoofPanelResponsestakenatgridintersectionpoints,normaltothepanelCopyright©2006AltairEngineering,Inc.Allrightsreserved.4PanelMobilityAnalysis-DescriptionPostProcessingEachgrid
6、rectangleisdividedintotriangularareas.Theareaofeachtriangularelementiscalculatedbasedonthecoordinatesofeachresponsepoint.Real/imaginarymobilitiesaretakenattheverticesofeachtriangularareaandaveraged.M=1/3(A+B+C)+j1/3(A+B+C)ave-triarealrealrealimagimagimagA
7、Thepanelmobilityisthencalculatedbymultiplyingthecomplexaverageofeachtriangularelementbytheareaoftheelementanddividingbythetotalarea.M=Sum(MxArea)/Sum(Area)panelave-tria(i)(i)(i)Thisiscalculatedforeachfrequencystep.BCTheresultsarefurtheraveragedtoa10Hzband
8、widthanda10Hz-200Hzbandwidth.Copyright©2006AltairEngineering,Inc.Allrightsreserved.5PanelMobility–ExampleBodyRearPanelFrontTowerExcitationRearDamperExcitationBeforeBandWidthAveragingAmplitudeNor
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