资源描述：
《基于多体动力学的轮轨磨耗手册(um)》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、UNIVERSALMECHANISM7.0RailwayWheelandRailProfileWearPredictionModuleUser’smanual2012UniversalMechanism7.02Chapter16.Wheelandrailwear16.RAILWAYWHEELWEARPREDICTIONMODULE........................................316.1.Generalities316.2.Modelsofwearintensity616.3.Example:creationof
2、wheelprofileevolutionprojectandanalysisofresults816.3.1.Evolutionproject816.3.2.Creationofnewproject816.3.3.Addanewfamilytotheproject916.3.4.Hierarchyofparameters1016.3.5.Railwayparameters1216.3.6.Finishconditions1516.3.7.Copyingfamilies1616.3.8.Parametersofprofileevolution1
3、816.3.9.Breakingandcontinuingcomputations2016.3.10.Processingresults2116.4.Wheelloading2416.5.References26UniversalMechanism7.03Chapter16.Wheelandrailwear16.Railwaywheelwearpredictionmodule16.1.GeneralitiesThepredictionofwheelandrailprofilewearintheprogrampackage“UniversalMe
4、cha-nism”isorganizedonthebaseofthescanningtool(UMExperiments)supplementedbytheevolutionconcept.Theevolutionisseriesofmultivariantcalculations(MVC)ofiden-ticalstructure(iterations)whichdifferinexternalconditions.Incaseofpredictionofwheelprofileweartheexternalconditionsarewhee
5、lprofilecurveswhicharechangedattheendofeveryMVC(iteration)incompliancewiththetribologicalwearmodel.LetusconsiderthemathematicalmodelofthewheelprofileevolutionaftersingleMVC.LetF={F},i=1,...,NbeasetoffamiliesinMVC.Everyfamilyisasimulationofrail-iFwaydynamicsongivenexternalcon
6、ditionsandasetofspeedvalues,F={V},j=1,...,N.iijviHereVisasinglesimulationwiththegivenspeed.InthecontextofasingleMVC,theex-ijternalconditionsare:·trackirregularities,·tracktype(tangent,curve,switch),·railprofiles,·curveorswitchparameters.Consideranexample.LetMVCcontainthreefa
7、miliesF={F,F,F},whereFisthe1231movementinatangentsection,F,F–movementincurvesR=300,600m,soN=3.23FThesetsofspeedsforeachofthefamiliesarethefollowing:F={15,20,25},F={13},F={15,18,21}123speedsinm/s.Dimensionlessweightcoefficientsareintroducedforeveryfamily.Thesecoefficientsde-t
8、erminetheratiosofexternalconditionsonthetrackforwhichthewearofwheelsiscompu
