热效应下的屈曲分析

IN-SERVICEBUCKLINGOFHEATEDPIPELINES王瑞丰2010-04-08Keywordsbuckling,submarinepipeline,thermalpressure.OffshoreplatformsSubmarinepipelinesTheengineeringbackgroundCompressionforcesmaybeinducedinpipelinesbytherestrainofaxialextensionsduetotemperaturechangesorothercauses.Theforcesmaybecausebucklingofpipeline.ThefactorsofinfluencetheaxialloadinthepipelineMechanicalpropertiesofthepipeline;Weightofthepipeline;Theinitialtensionafterlaying;Thepressuredifferenceacrossthepipewall;Temperaturevariations.TwomajorcausesofcompressiveforceThermalpressureloadingsInternalpressureloadingsTheforceP0createdbyfullrestraintofthermalexpansionTEAP0ThefreeaxialstraintprvtprE21Theaxialcompressiveforce,whenεiscompletelyrestrainedvtAprEAP5.00BucklingmodesVerticalbucklingLateralbucklingVerticalbucklingmode048222Lxmyny048222LxmynylateralbucklingmodesGodblessyou!