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毕业设计(论文)`题目：基于Matlab的转子故障振动信号分析院系机械工程系专业班级学生姓名指导教师二○一六年六月华北电力大学本科毕业设计（论文）I基于Matlab的转子故障振动信号分析摘要随着机械行业的日益发展，转子等旋转机械的故障日渐趋多，转子的故障诊断技术受到越来越多的重视，并在世界范围内取得了长足的进步。作为大型机器中不可或缺的部件，有着举足轻重的作用，但自身也存在缺点：造价很高，结构纷繁杂乱，如果出现受损的情况，则需要很长的时间来维修，故对其安全可靠性具有较高的要求。对发电机及其转子进行状态监测和信号分析，避免更大事故的产生，对于安全生产具有重要意义，对于工业发展具有积极的推动作用。转子故障类型主要有四种：转子不平衡、转子不对中、动静碰摩以及油膜涡动与振荡。首先明确转子的故障类型及故障机理，掌握不同类型的故障特征，能够准确区分转子的几种故障类型。然后应用Matlab软件，在Matlab软件中建立起转子故障图形程序，利用Matlab中的程序对仿真信号及故障数据进行分析，包括信号的时域图、频域图以及轴心轨迹图，最后与已知的故障机理进行比较，检验其正确性。关键字：转子；Matlab；故障机理；信号分析华北电力大学本科毕业设计（论文）IIANALYSISOFROTORFAULTVIBRATIONSIGNALBASEDONMatlabAbstractWiththedevelopmentofthemachineryindustry,therotorandotherrotatingmachineryarebecomingmoreandmorecommon.Rotorfaultdiagnosistechnologyhasbeenpaidmoreandmoreattention,andhasmadegreatprogressintheworld.Asanindispensablepartofthelargemachine,althoughithasapivotalrole,itcomeswithownshortcomings:highcost,complexstructure,alongtimetorepairthedamaged.Therefore,itrequireshighsafetyandreliability.Theconditionmonitoringandsignalanalysisofthegeneratoranditsrotorareofgreatsignificancetothesafetyproduction,andtheyplayapositiveroleinpromotingthedevelopmentoftheindustry.Therearefourkindsofrotorfaulttypes:rotorunbalance,rotormisalignment,staticanddynamicrubimpactandoilwhirlandoscillation.First,thefaulttypesandfaultmechanismoftherotorareclearlydefined,andthefaultcharacteristicsofdifferenttypesoffaultscanbemastered.EstablisharotorfailuregraphicsprogramintheMatlabsoftware,andtheuseofMatlabprogramforthesimulationofsignalandfaultdataanalysisincludesthesignaltimedomain,frequencydomainandtheaxistrajectoryFinallyknownfailuremechanismwerecompared,totestitscorrectness.Keywords:rotor;Matlab;failuremechanism;signalanalysis华北电力大学本科毕业设计（论文）III目录摘要................................................................................................................................IAbstract.........................................................................................................................II1绪论.............................................................................................................................11.1课题背景..........................................................................................................11.2国内外发展概况..............................................................................................21.3Matlab软件简单介绍......................................................................................21.4课题研究内容..................................................................................................31.5本章小结..........................................................................................................42转子系统典型故障机理与特征.................................................................................52.1转子不平衡......................................................................................................52.2转子不对中.....................................................................................................72.3动静碰摩.........................................................................................................92.4油膜涡动与油膜振荡...................................................................................102.5本章小结........................................................................................................113振动信号分析方法及仿真分析...............................................................................123.1信号的时域分析方法....................................................................................123.2信号的频域分析方法....................................................................................133.3信号的轴心轨迹图........................................................................................143.4仿真分析........................................................................................................143.6本章小结........................................................................................................154基于Matlab的转子故障振动信号分析..................................................................174.1数据分析........................................................................................................174.1.1转子不平衡..........................................................................................174.1.2动静碰摩..............................................................................................194.1.3油膜涡动和油膜振荡..........................................................................214.2本章小结........................................................................................................235结论与展望...............................................................................................................245.1结论................................................................................................................245.2展望................................................................................................................25参考文献......................................................................................................................26致