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挖掘机动力总成悬置系统隔振分析及优化 Abstract Thepowertrainsuspensionsystemofexcavatorisanimportantcomponentofthewholeexcavator,whichisresponsibleforisolatingthepowertrainfromthechassisandreducingthevibrationandnoiseoftheexcavatorduringoperation.Inthispaper,avibrationanalysisandoptimizationstudywasconductedonthepowertrainsuspensionsystemofanexcavator,inordertoimprovetheperformanceandstabilityoftheexcavator. Introduction Excavatorsarewidelyusedintheconstructionindustry,miningindustryandotherfields.Asoneofthemostimportantcomponentsofexcavators,thepowertrainsuspensionsystemplaysavitalroleintheperformance,stabilityandnoisereductionofexcavators.Thevibrationcausedbythepowertrainduringtheoperationoftheexcavatornotonlyaffectsthedrivingcomfortoftheoperator,butalsoaffectsthestabilityofthemachineandevenposesathreattothesafetyoftheoperator.Therefore,theoptimizationofthepowertrainsuspensionsystemisofgreatsignificancetoimprovetheperformanceandstabilityoftheexcavator. AnalysisofPowertrainSuspensionSystem Thepowertrainsuspensionsystemofanexcavatormainlyincludestheenginemounts,transmissionmountsanddifferentialmounts.Theenginemountsareusedtoconnecttheenginetothevehiclechassis,whilethetransmissionmountsareusedtoconnectthetransmissiontotheengine,andthedifferentialmountsareusedtoconnectthedifferentialtothetransmission.Thevibrationandnoisegeneratedbythepowertrainaremainlytransmittedtothevehiclechassisthroughthesemounts,soitisveryimportanttooptimizethedesignofthesemounts. Thevibrationandnoisegeneratedbythepowertraincanbedividedintotwotypes:highfrequencyandlowfrequency.Thehigh-frequencyvibrationiscausedbytheengine'scombustionprocess,whilethelow-frequencyvibrationiscausedbythereciprocatingmotionoftheengineanddrivetraincomponents.Toreducethetransmissionofvibrationandnoisetothevehiclechassis,thepowertrainsuspensionsystemmusthavegooddampingandisolationcharacteristics. OptimizationofPowertrainSuspensionSystem Tooptimizethepowertrainsuspensionsystem,thefirststepistoestablishamathematicalmodelofthesystem.Themathem