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1、THEDESALINATIONPROCESSESSITESELECTION,LAYOUTANDCIVILWORKS-MechanicalVibrationInsulation-J.D.RenardMECHANICALVIBRATIONINSULATIONJ.D.RenardTractebelEnergyEngineering,AvenueAriane7,B-1200BrusselsBelgiumKeywords:Alternatetranslation,Bearing,Centrifugalforce,Flexibility,
2、Harmonic,Resonance,Rigidity,TransitoryContents1.Introduction2.OriginandTypeofVibrations2.1.PeriodicVibrations2.2.NonperiodicVibrations3.VibrationAnalysis3.1.Resonance3.2.DynamicAmplification3.3.ConsequencesontheMachineFoundationDesign4.TheReductionofVibrations4.1.Mo
3、nolithicFoundations4.2.AntivibrationSystemsGlossaryBibliographyandSuggestionsforfurtherstudySummaryThedifferenttypesofvibrationscreatedbymachinesareexaminedanddescribed.Theamplitudesofthevibrationsduetoarotatingmachine(harmonicmotion)arecalculatedandtheconditionstoo
4、btainresonanceareestablished.Subsequently,thecriteriatodesignmachinefoundationsandsometechnicalsolutionstoreducetheamplitudesofvibrationsaregiven.1.IntroductionUNESCO–EOLSSMovingpartsofmachinessuchasturbines,pumps,dieselengines,fans,mills,orcrushersgeneratevibration
5、s.Thesevibrations,ifnotcorrectlydampedorattenuated,canbetheoriginofabadSAMPLECHAPTERSfunctioningofthemachineor,evenworse,cancausethedestructionoftheirsupportsifnotofthemachinesthemselves(Timoshenkoetal.1974).Moreover,thosevibrationscanalterthefunctionalityofotherequ
6、ipmentinthevicinity.Insomecircumstances,shocksandvibrationscreatedbymachinescandisturbsensitiveequipmentorsimplyhumanlife.Onewaytoimprovethoseeffectsandtoreducethecostofmaintenanceofthemachinesistomakeagoodandwelldynamicallydesignedfoundation(BSPC1974,DIN1988a,b).©E
7、ncyclopediaofDesalinationandWaterResources(DESWARE)THEDESALINATIONPROCESSESSITESELECTION,LAYOUTANDCIVILWORKS-MechanicalVibrationInsulation-J.D.Renard2.OriginandTypeofVibrations2.1.PeriodicVibrationsThesevibrationsarethemostfrequentlyencounteredindesalinationandassoc
8、iatedpowerplants(Major1962,Rausch1959).Thetraceoftheamplitudeofthevibrationversustimereproducesitselfafteracertaindurationcalledperiod(see
