机械振动基础

《机械振动基础》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、TheoryofMechanicalVibrationwithApplicationsDr.ShuwenWangSchoolofAutomobileEngineeringHarbinInstituteofTechnologyatWeihaiE-mail:wsw@hitwh.edu.cnTel.:15266312508Aims•Describemathematicallythebehaviourofsimplemechanicalvibratingsystems•Determinetheresponseofthesesystemstotransienta

2、ndharmonicexcitation•Analysesystemswithmorethanonedegreeoffreedom•toteachsomeessentialtoolsfortheunderstanding,analysisandmeasurementofvibrationinengineeringstructures•Understandrandomvibration(optional)Mech.Vib.byS.WangatHITWHObjectives•Obtaindifferentialequationsformechanicals

3、ystemscomprisingmasses,rigidbodies,rotors,springsandviscousdashpots•Reducealldifferentialequationstoastandardform•Solvethesestandard-formequationsfortheresponsetostep,ramp,impulsiveandharmonicexcitationMech.Vib.byS.WangatHITWHObjectives•Understandtheconceptofdampingandthemeaning

4、ofdampednaturalfrequency,dampingfactorandlogarithmicdecrement•Obtainandsolvedifferentialequationsinmatrixformformechanicalsystemswithmorethanonedegreeoffreedom•Applytherudimentary/basicprinciplesofmodalanalysistothefreevibrationofatwo-degree-of-freedomoscillatorsubjecttoinitialc

5、onditionsMech.Vib.byS.WangatHITWHObjectives•Befamiliarwiththetheoryandpracticeofmodalanalysisanditsapplicationtoengineeringstructures;•Beabletoapplyexperimentalmodaltechniques;•Understandthevibrationbehaviourofidealisedsystemcomponents,andbeabletodrawimplicationsfromthisforcompl

6、excoupledsystems;•Appreciatethephysicalprinciplesofvibrationdamping;•Beabletoanalysesimpledampedvibratingsystems.Mech.Vib.byS.WangatHITWHContents第一章机械振动的基本概念(2学时)1)机械振动的基本概念(BasicConceptsofVibration)；2)振动的分类(ClassificationofVibration);3)振动分析的程序(VibrationAnalysisProcedure)第二章单自由度

7、系统的振动(6学时)1)无阻尼系统的自由振动(FreeVibrationofanUndampedSystem)，2)粘性阻尼系统的自由振动(FreeVibrationwithViscousDamping);3)库仑阻尼系统的自由振动(FreevibrationwithCoulombDamping)，4)迟滞阻尼系统的自由振动(FreeVibrationwithHystereticDamping)5)单自由度系统的简谐强迫振动(HarmonicallyExcitedVibrationofaSingleDegreeofFreedomSystems)6)周期

8、强迫振动(VibrationUnderaPeriodicForce)7)非周期强迫振动(Vib