机械振动噪声与控制 参赛课件

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1、FundamentalsofMechanicalVibrationandNoise参赛选手：****教科书（Textbook）:赵玫等，机械振动与噪声学，科学出版社，2004参考书（ReferenceBooks）:W.T.ThomsonandM.D.Dahleh,TheoryofVibrationswithApplications(5thed.),PrenticeHall,19972.•R.F.Barron,IndustrialNoiseControlandAcoustics,MarcelDekker,2003•郑兆昌主编，机械振动（上册），机械工

2、业出版社，1980•商大中，动力分析基础，哈尔滨工程大学出版社，1999•季文美，机械振动，科学出版社，19851.1MechanicalVibrationandControlChapter1Introduction1.1.1SummaryofMechanicalVibrationVibratingPhenomenaintheWorldVibrationarefoundinmanybranchesofscienceandengineering1.1MechanicalVibrationandControlChapter1Introduction1.

3、1.1SummaryofMechanicalVibrationUndesirablevibrations：Vehicle;Noise;Machines&Structures;Earthquake;PowerunitsineverykindsofvesselsmaycausevibrationsUsefulvibrations：Stringvibration;harmonicoscillator,resonator;Vibratingroadroller;Vibratingfeeder;Vibratingformingmachine.1.1Mecha

4、nicalVibrationandControlChapter1Introduction1.1.1SummaryofMechanicalVibration1.1MechanicalVibrationandControlChapter1Introduction1.1.2BasicConceptMechanicalVibration?Researchaim?Vibrationisaphenomenathatabodyorstructureoscillatesaboutsomespecifiedreferencepoint.Vibrationiscomm

5、onlyexpressedintermsoffrequency,amplitudeandPhaseangle.1.Eliminationorsuppressionofundesirablevibrations2.Generationofthenecessaryformsandquantitiesofusefulvibrations1.1MechanicalVibrationandControlChapter1Introduction1.1.3ModelofVibrationSystem离散系统（集中参数系统）Discretesystem(Lumpe

6、dparametersystem)连续系统（分布参数系统）Continuoussystem(Distributedparametersystem)1.1MechanicalVibrationandControlChapter1Introduction1.1.4ClarificationofMechanicalVibrations(1)按自由度分(Accordingtothedegreeoffreedom)Theleastnumberofmutuallyindependentparameters(coordinates)requiredtouniqu

7、elydefineamaterialsystem'spositioninspace,time,etc单自由度系统振动(singledegreeoffreedom)多自由度系统振动(multipledegreeoffreedom)连续系统振动(continuoussystem)Chapter1Introductionθθz单自由度系统振动(singledegreeoffreedom)多自由度系统振动(multipledegreeoffreedom)ABABChapter1Introduction模型与自由度(Modelanddegreeoffreed

8、om)1.1MechanicalVibrationandControlChapter1Introduction1.1.4C