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《考虑摩擦因素的结合面切向接触刚度分形预估模型及其仿真分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第33卷第5期摩擦学学报Vol33No52013年9月TribologySept,2013考虑摩擦因素的结合面切向接触刚度分形预估模型及其仿真分析李小彭,鞠行,赵光辉,梁亚敏,闻邦椿(东北大学机械工程与自动化学院,辽宁沈阳110819)摘要:为建立更完善和精确的结合面接触刚度模型,本文根据分形理论和摩擦学原理,从微观角度建立了考虑摩擦因素的结合面切向接触刚度分形预估模型.通过数值仿真分析研究了接触载荷、分形维数、摩擦系数和接触面积等因素对结合面切向接触刚度的影响.分析结果表明:结合面切向接触刚度随法向载荷和分形维数的增加
2、而增大,而随分形尺度参数的增大而减小;摩擦系数对结合面切向接触刚度的影响较大,不同实际接触面积下的切向刚度相差较大;当分形维数较小时,摩擦系数对结合面切向刚度的影响将降低.这些研究对于进一步开展结合面的动力学特性研究具有重要意义.关键词:结合面;摩擦;分形;切向接触刚度;仿真中图分类号:TH117.1文献标志码:A文章编号:1004—0595(2013)05—0463—06FractalPredictionModelforTangentialContactStifnessofJointSurfaceConsidering
3、FrictionFactorsandItsSimulationAnalysisLIXiao—peng,JUXing,ZHAOGuang—hui,LIANGYa—min,WENBang—chun(SchoolofMechanicalEngineering&Automation,NortheasternUniversity,Shenyang110819,China)Abstract:Toestablishamorecompleteandaccuratemodeloftangentialcontactstiffnessofjo
4、intsurface,thefractalpredictionmodelconsideringfrictionfactorsfortangentialcontactstiffnessofjointsurfacewasestab]ishedfrommicrocosmicangle.Thismodelwasbasedonfractaltheoryandprinciplesoftribology.Theinfluencesofcontactload,fractaldimension,frictioncoeficient,con
5、tactareaandotherfactorsontangentialcontactstiffnessofjointsurfacewerestudiedbythewayofnumericalsimulationanalysis.Theresultsshowthattangentialcontactstiffnessofjointsurfaceincreasedwiththeincreaseofnormalloadandfraetaldimension.Itdecreasedasaresultoftheincreaseof
6、fractalscaleparameters.Frictioncoeficienthadagreaterimpactontangentialcontactstiffnessofjointsurface.Tangentialstiffnesshadlargerdifferenceunderdifferentrealcontactarea.Theeffectoffrictioncoeficientontangentialcontactstiffnessofjointsurfacedecreasedwhenthefractal
7、dimensionwassmal1.Theseresearcheswereofgreatsignificancetothefurtherstudyonthedynamicperformanceofthejointsurface.Keywords:jointsurface,friction,fractal,tangentialcontactstiffness,simulationReceived23January2013,revised18July2013,accepted14August2013,availableonl
8、ine28September2013.Correspondingauthor.E—mail:xpli@me.neu.edu.cnTel:+86—24—83674338.TheprojectwassupposedbytheNationalNaturalScienceFoundationofChina(51275079)
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