螺栓连接接触界面的不确定性参数辨识

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中图分类号：TH113.1 文献标志码：A DOI：10.16385/j.cnki.issn.1004-4523.202311035

Abstract：Theuncertaintyofthecontactintefaceparametersofoltedjointsisaniportantfactorafectingtheauracyandelibiltyf assemblystructuresTerefore，teucertaintyparaetersofteontactintefceuderdiferentoltpreload，extealadadgetric featurestatesinteoeonwreidentifedandanacurateboltoeonparameerodelasestabsdTeniteelentodeof theuncertaintyparametesofteoltedbeamindiernttatsisstablisedbyombiingteofsetEulerBeoulieamelentadte randomnodeelementofteontactiteface.TeBayesianmetodisusedtoidentifyteparameterstributioofteboltedontactiteface inasinglestate，andteBayesianmodalaeblyalgorithmisusedtoidentifyteparameterdistrbutionoftheoltedontactinterfacein diferentstates，andtepropagationprocessoftheucertaintyparametersoftecontactintefacefromasinglestatetmultileatesis analyzed.heifueof teunceraintydistrbutioofontactitefceparameesonthstructuraldyaicsuderdifeetolteload， extealoadandgeometricfeaturetatesisexplored.Teresultsshowthatinasinglestate，tecontactintefaceparametersarenoaly distibuted，andthedistributionofthetransverseadaxialstifessofthenodeshasaweakcoelation，andintemul-statethe distrbutionoftedomparametersofthecotactinterfacisxpeedtoblinalyelatedtotesateofteoltedstructureasahole， andthelcaluncertaityiseibited，andthefrequecysposeofteoltedstructuegradallivergsiththireaseofthesulation frequency.

eywords：bolted connection; contact interface;Bayesian method; randomparameter distributiol

螺栓连接广泛应用于工程结构中，其接触界面的力学行为是螺栓连接的重要特性，表现出复杂的不确定性力学行为，对整体结构刚度及动力学特性产生较大影响，接触界面的不确定性参数是装配结构中不确定性的主要来源[1]。（剩余12944字）