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1、MechanicalvibrationreportIntroductionInourdailylife,vibrationcanbesaidtobeeverywhere,andtheimpactofvibrationonourproductionandlifeisalsogoodandbad.Toimprovetheefficiencyoflargemetallurgicalcoalindustryengineering,vibratoryroller,paverhighwayconstruction,
2、butalsoharmfulvibration:largeequipmentoflargecentrifugalcompressor,nuclearmainpump,aviationturbineengineoncetheconsequencesofunstablevibrationwillbring.Howtomakeuseoftheadvantagesofgoodvibrationandavoidtheharmitbrings,itshouldbeanalyzedfromthemodalanalys
3、isoftheactualstructure.Suchasthevibrationsystem,whichiswidelyusedinthefieldofaerospaceengines,suchasthecombustionchamber,compressor,turbine,etc..Forsuchasystem,inthecourseofoperation,itcanincludevibration,aswellasitsstrengthandstiffnesscanbeartheload,iti
4、srequiredtodesignandcalculate,aheadoftheexperiment.UseMATLABsoftwaretosimulatetheactualvibrationofeachordernaturalfrequencyandnormalmode,itisfoundthatthenaturalfrequencyandthemainformationscanbeobtainedveryeasily17Mechanicalvibrationreportandquickly.在我们的
5、生活中,振动可以说是无处不在,而振动给我们生产和生活带来的影响也是有好有坏。提高对大型冶金煤炭工业工程的效率,振动压路机、摊铺机等公路建设,也有有害的振动:大型离心压缩机、核电站主泵、涡轮航空发动机等大型设备一旦出现不稳定的振动将带来的后果。如何利用好好振动的好处,避免它所带来的危害,就应该先从对实际结构的模态进行分析。如课题所示的振动系统,这是一种在航空发动机领域中广泛应用的盘式轴系统,如燃烧室、压气机、涡轮等。对于这样一个系统,在运行过程中,它可以包括振动,以及它的强度和刚度能否承受负载,它是需要设
6、计和计算,通过实验提前。利用MATLAB软件来模拟实际的振动得到的各阶固有频率和正常模式,可以很方便快捷地得到它的固有频率和主阵型。17MechanicalvibrationreportContentsChap.1MatrixIterationmethodfornaturalfrequenciesandnormalmodesPart1knowledgeoftheory………………………………………………….……..5Part2ProgrammingCalculation1.programcode....
7、...................................................................62.Theresultofprogramming....................................................73.Modeshapecurve................................................................8Chap.2Transfermatrixmethodfo
8、rnaturalfrequenciesandnormalmodesPart1.knowledgeoftheory........................................................9Part2ProgrammingCalculation1.programcode.....................................................................