腐蚀管道临界剩余壁厚的有限元分析

··———————————————收稿日期：20061106作者简介：1955腐蚀管道临界剩余壁厚的有限元分析魏化中1，周小兵1，舒安庆1，帅健2（1.武汉工程大学机械工程学院，湖北武汉430074；2.石油大学机电工程学院，北京102249）以含轴向腐蚀缺陷压力管道的最小允许壁厚为研究对象，应用大型通用有限元分析软件－ANSYS的OPT优化设计模块，建立有限元模型，进行非线性有限元分析。并以国外公开发表的实验模型为算例，得到与实验数据相近的结果，验证了有限元分析的准确性。腐蚀管道；轴向缺陷；临界壁厚；有限元分析；OPTO242.21A10060316200704002703FineteelementanalysisofcriticalresidualwallthicknessofcorrodedpipelineWEIHua-zhong1ZHOUXiao，-bing1SHUAn，-qing1SHUAIJian，1.SchoolofMechanicalEngineeringWuhanInstitute（，ofTechnologyWuhan430074China;，，2.CollegeofMechanicalandElectricalEngineering，PetroleumUniversityofChinaBeijing102249China，，）Abstract：Inordertocalculatethecriticalresidualwallthicknessofcorrodedpipelineincludinglongitudinaldefect,Thepapertakesitastheresearchobject,appliestheoptimizationmoduleofthegeneralfiniteelementsoftware—ANSYS,setupfiniteelementmodels,carryonnonlinearfiniteelementanalysis.Bythevalidationofforeignexperimentaldate,Itcanprovideaccurateprediction.Keywords：corrodedpipelinelongitudinaldefectcriticalwallthickness；；；finiteelementanalysisOPT；Barlow[1]Tmin2PDσ=1minTPDσ[2]ANSYS1有限元模型··PLANE8212.5图1腐蚀管道二维有限元模型ANSYSYPANSYST12图2T1实验模型的应力应变曲线2失效准则的确定Binfu1995[2],B31GStewart[3]()'21/nfWDπ=+2WW=0W=Dn'uσ′uσ3有限元分析的后处理ANSYSMiseststRPT()/PsTttR=−334实例分析与验证T1T4[4]4X60200GPa0.312.0910.772422.5MPa589.6MPa18006404803201600SIG0-0.2-0.4-0.6-0.8-1EPS··表1实例数据与有限元分析结果总结mmNODmmTmmLdwMPammmmT1323.99.8255.66.9595.314.4012.853.04T2323.99.713506.8595.313.5772.862.98T3323.99.91433.47.0895.312.1252.832.75T4323.99.74527.87.0695.311.3012.682.7612.85mm2.86mm2.83mm2.68mmBarlow5.52mm5.2mm4.65mm4.33ANSYS3.04mm2.98mm2.75mm2.76mm5结语12ANSYS3参考文献：[1].[J].200322124043.[2]BinFuMikeGKirkwoodPredictingfailurepressureofinternallycorrodedpipelineusingthefiniteelementmethodASMEOMAE13thInternationalConferenceofMechanicArcticEngineering,Houston19955175184.[3]StewartG,KleverFJ,RitchieDAnAnalyticalModeltoPredicttheBurstCapacityofPipelinesProc13thOMAEConferenceVol5,PipelineTechnology,ASME1994[4]MokDRBPickRJGloverAGBurstingoflinepipewithlongexternalcorrosionJournalofpressurevesselandpiping199146195216[5].[J].200523940[6][J]20042352730[7].[J]20053131719（上接第23页）5%10%10%112kW3.2风扇的性能计算11S=D/22=0.196m2D为2S=0.33m21S/2S=0.592V=3.1430000.5/60=78.5m/s4结论-NTU-NTU参考文献：[1].[M].2000.[2].[M].2000.[3].[M].1984.