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燃料电池轿车车内噪声特性实验分析与控制研究(3)

时间:2025-07-14   来源:未知    
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Abstract

ABSTRACT

FCV(FuelCellVehicle)ispropelledbythefuelcellpowersystem.TheinteriornoisecharacterofafuelcellcaristotallychangedduetothedifferentpowersystemandvehiclestructurecomparedwiththecombustrionenginecaLConsideringthatinteriornoiseisoneofthemostimportantindexesforvehicle’sridecomfort,itisnecessarytodosomeresearchtoFCV’SinteriornoiseandtotakeeffectiveandpracticalmeasurestocontrolnoiseandimproveFCV’Sridecomfort.

Thestudyobjectofthispaperisoneprototypeoffuelcellcars‘star3’.Throughavibro—acousticexperimenttheinteriornoiseandsomecomponents’vibrationlevelsindifferentoperatingconditionaremeasured.Thetestresultsshowthatinteriornoiseofthereal"ismoreseriousthanthatofthefrontandthemajorfrequencydomainofthenoiseisbelow1500Hz.Inlowspeedoperatingconditionthehydrogensupplypumpandfanoffuelcellaccessorialsystemarethemainnoisesourcesandtheairbornenoisetransfersdirectlyintointeriorthroughtheholesandleaksoftherearshelfandsquabpanel;whilethetractionmotor’Scontributiontotheinteriornoisebecomesmoreandmoredominatedwiththegrowthofthevehicle’Sspeed.Themotor’SunbalanceexcitingforcestransfertoCarbodythroughmountsandsubframewhichcausesthebodypanelsvibratingandradiatingnoise.

Accordingtotheexperimentalresultandpracticalfactors,wetakenoiseinsulationandabsorbilitymeasurestocontroltheairbornenoiseradiatingfromhydrogenpumpandfantotransferintotheinterior.Thevalidationtestprovesthatthesemeasuresareeffective.ThenoisecausedbythetractionmotorinhighspeedoperatingconditionCanbereducebyoptimizethemount’Sstiffnessanddampparameterswhichalsoimprovethemountsystem’Svibrationinsulatedperformance.Inthispaperasimulationmodeloftractionmotor-flexiblesubframemountsystemisfoundedinADAMS.Basedonthismodeltheflexiblesubframe’seffecttothesystem’Smodeisdiscussedandthetractionmotor’Smodediscoupledcharacteriscalculated.Atlastthestiffnessparametersofthemountsareoptimizedinthe

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