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微动接触中分形粗糙表面的温升分布研究.docx

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微动接触中分形粗糙表面的温升分布研究 摘要 微动接触中，摩擦发热是不可避免的现象。分形粗糙表面的实际应用中普遍存在，因此研究微动接触中分形粗糙表面的温升分布对于优化设计和提高效率具有重要意义。本文通过理论推导和数值仿真方法，探究了微动接触中分形粗糙表面的温升分布特征，并分析了表面粗糙度、接触压力和运动速度等因素对温升分布的影响。研究结果表明，在分形几何结构下，表面粗糙度越大温升越高，接触压力和运动速度对温升分布的影响同样显著。 关键词：微动接触、分形粗糙表面、摩擦发热、温升分布、数值仿真 Introduction Intheprocessofmicro-motioncontact,frictionalheatingisaninevitablephenomenon.Fractalroughsurfacesarecommoninpracticalapplications.Therefore,studyingthetemperaturedistributionoffractalroughsurfacesinmicro-motioncontactisofgreatsignificanceforoptimizingdesignandimprovingefficiency.Inthispaper,theoreticalderivationandnumericalsimulationmethodsareusedtoexplorethetemperaturedistributioncharacteristicsoffractalroughsurfacesinmicro-motioncontact,andtheeffectsofsurfaceroughness,contactpressure,andmovementspeedonthetemperaturedistributionareanalyzed.Theresultsshowthatunderfractalgeometrystructure,thelargerthesurfaceroughness,thehigherthetemperaturerise,andtheeffectsofcontactpressureandmovementspeedonthetemperaturerisedistributionarealsosignificant. Methodology Theheattransferequationandthefractaltheorywereusedtoestablishthetheoreticalmodelforthetemperaturedistributionofthecontactsurface.NumericalsimulationswereconductedusingANSYSsoftware.Thesimulationparametersincludecontactpressure,surfaceroughnessparameters,andmovementspeed.Thesimulationresultswerecomparedwiththetheoreticalmodeltoverifytheaccuracyofthemodel. ResultsandDiscussion Thesimulationresultsshowthatthetemperaturerisedistributionofthecontactsurfaceisnotuniform.Themaximumtemperatureriseoccursatthecontactedge,andthetemperaturegraduallydecreasestowardsthecenter.Thesurfaceroughnessofthecontactsurfacehasasignificanteffectonthetemperaturerisedistribution.Thehigherthesurfaceroughness,thehigherthetemperatureriseatthecontactedge.Inaddition,thecontactpressureandmovementspeedalsohaveasignificanteffectonthetemperaturerisedistribution,andtheeffectismoreobviousunderhighercontactpressureandmovementspeed. Conclusion Inmicro-motioncontact,thetemperatureriseofthecontactsurfaceisa