Actran-XXXX用户大会-PlasticOmnium-汽车地板空气声、

InsertyourlogoActranUsers’Conference2012October3-4,2012-Brussels,BelgiumAcousticinsulationofsteel&thermosetpanelPhilippeGilotte–BenjaminSurowiecPlasticOmniumAutoExteriorInsertyourlogoAcousticinsulationofsteel&thermosetpanel•Summary–PlasticOmniumproductlines–Acousticpropagationmodeonrearfloor–Plateinsulation(petitecabine)andpowertransmission(RTC-III)–Steel,thermosetandthermoplasticplateTLresults–Dynamicloadcontributiononsteelrearfloor–Partialpoweranalysisonsteelandthermosetrearfloor–Transmissionlosscomparisonbetweensteel&thermosetrearfloorActranUsers’Conference2012October3-4,2012-Brussels,BelgiumInsertyourlogoAcousticinsulationofsteel&thermosetpanel•PlasticOmniumGroup2010ActranUsers’Conference2012October3-4,2012-Brussels,BelgiumAUTOMOTIVE82%duchiffred’affairePlasticOmniumAutoExteriorPiècesextérieuresPlasticOmniumAutoInergyreservoirsENVIRONMENT18%duchiffred’affairePlasticOmniumEnvironmentGestiondesdéchetsCompagnieSignatureSignatureroutière3Md€ofturnover96plantsin27countries18000employeesMondialleaderinitsproductlinesInsertyourlogoAcousticinsulationofsteel&thermosetpanel•AutomotiveproductlinesActranUsers’Conference2012October3-4,2012-Brussels,BelgiumInsertyourlogoAcousticinsulationofsteel&thermosetpanel•Roadnoisetransmissionat90kphonrearfloor:–Tyre/road:airbornenoise–Roadvibration:structure-bornenoiseActranUsers’Conference2012October3-4,2012-Brussels,BelgiumRoadvibrationTyre/roadnoiseInsertyourlogoAcousticinsulationofsteel&thermosetpanel•Structure&airbornetransmission–“Petitecabine”measurementTyre/roadairbornenoise–BancRTC-IIImeasurementRoadvibrationstructure-bornenoiseActranUsers’Conference2012October3-4,2012-Brussels,BelgiumPetitecabine:LoudspeakerexcitationBancRTC-III:ShakerexcitationInsertyourlogoAcousticinsulationofsteel&thermosetpanel•Transmissionlossmeasurement–“Petitecabine”transmissionmeasurement–LoudspeakerdiffusedsamplefieldexcitationActranUsers’Conference2012October3-4,2012-Brussels,BelgiummicrophonesampleLoudspeakerCourtesyofENSIM2Adescription(fromPSAD455038or1463)InsertyourlogoAcousticinsulationofsteel&thermosetpanel•Transmissionlosscomputation:DSFexcitationActranUsers’Conference2012October3-4,2012-Brussels,BelgiumInfiniteelementsClampedconditionsDiffusedsamplefieldexcitationacousticpowertransmissionWiα1Pa²WtSteelplatesubmittedtoexcitation(400x400mm²)Frame(500x600mm²)InsertyourlogoAcousticinsulationofsteel&thermosetpanelActranUsers’Conference2012October3-4,2012-Brussels,Belgium•Transmissionlosscomputation:DSFexcitation–TLlevelof30dBat1000Hzforasteelplateof0,77mmwithClampedplate-Slopeof6dB/octave[]dBTLτ1log.1010=incidentetransmiseWW=τ6dBwtwiSteel1mmSMCPPGFρ[g/m3]7,81,41,2h[mm]0,772,22,7Ms[kg/m²]6,0063,083,24SteelSMCPPGFν0,350,350,35E[MPa]21000070005200η[%]0,20%1%1%InsertyourlogoAcousticinsulationofsteel&thermosetpanel[]dBTLτ1log.1010=incidentetransmiseWW=τActranUsers’Conference2012October3-4,2012-Brussels,Belgiumwtwi•Transmissionlosscomputation:DSFexcitation–TLvalueof30dBat1000Hzforasteelplateof0,77mmwithClampedplate-Slopeof6dB/octave6dBSteelSMCPPGFν0,350,350,35E[MPa]21000070005200η[%]0,20%1%1%Steel1mmSMCPPGFρ[g/m3]7,81,41,2h[mm]0,772,22,7Ms[kg/m²]6,0063,083,24InsertyourlogoanalyticTL14,016,018,020,022,024,026,028,030,032,0100100010000frequencyTLRdiffsteel0,77mmRdiffSMCRdiffPPRdiffsteel1mmAcousticinsulationofsteel&thermosetpanel•Transmissionlosscomputation:analyticalsolution–Inincidentwavewhen–indiffusedfield:ActranUsers’Conference2012October3-4,2012-Brussels,Belgium≈CMRS002log20ρω[]0023,0log10RRRdiff−≈CMS02ρω≥TLvalueisequalto25dBforasteelplateof0,77mmthicknessat1000HzSteel1mmsteel0,65SMCPPGFρ[g/m3]7,67,81,80,9h[mm]10,772,22,7Ms[kg/m²]7,66,013,962,43Semiinfiniteplate(freecondition)InsertyourlogoAcousticinsulationofsteel&thermosetpanel•Experimentalresult:acousticpowerradiation–“BancRTC-III:Rayonnementtoledecarrosserie”–Steelplatedisplacementmeasuredbyascanninglaser–ShakerexcitationActranUsers’Conference2012October3-4,2012-Brussels,BelgiumshakerScanninglaserSteelplateFromGrégoireLepoitevinMScThesis-ChalmersInsertyourlogoAcousticinsulationofsteel&thermosetpanel•Numericalresult:acousticpowerradiationActranUsers’Conference2012October3-4,2012-Brussels,BelgiumInfiniteelementsSteelplatesubmittedtoexcitation(400x400mm²)Frame(500x600mm²)Rigidfixationforceexcitation(F=1N)acousticpowerradiationWrInsertyourlogoAcousticinsulationofsteel&thermosetpanel•Powerradiationonsteelplate–Shaker(F=1N)induceslargedisplacementatlowfrequency–PowerradiationhigherwithvibrationthanwithDSFexcitationActranUsers’Conference2012October3-4,2012-Brussels,BelgiumSteel1mmSMCPPGFρ[g/m3]7,81,41,2h[mm]0,772,22,7Ms[kg/m²]6,013,083,24SteelSMCPPGFν0,350,350,35E[MPa]21000070005200η[%]0,20%1%1%Wrforceexcitation(F=1N)RadiatedpowerwithDSFexcitation(1Pa²)Radiatedpowerwithdynamicload(1N)InsertyourlogoAcousticinsulationofsteel&thermosetpanel•Powerradiationonsteelplate–Springof106N/maroundtheframe–SteelplatevelocityresponseandmodaldeformationActranUsers’Conference2012October3-4,2012-Brussels,BelgiumSteelSMCPPGFν0,350,350,35E[MPa]21000070