附加質(zhì)量及多機(jī)振源對(duì)浮筏隔振系統(tǒng)振動(dòng)響應(yīng)的影響.pdf

1、大連海事大學(xué)碩士學(xué)位論文附加質(zhì)量及多機(jī)振源對(duì)浮筏隔振系統(tǒng)振動(dòng)響應(yīng)的影響姓名：閆旭申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：輪機(jī)工程指導(dǎo)教師：于洪亮20091101AbstractThevibrationandnoisecontrolproblemofshipmainenginesystemiSalwaysahotspotintheshipengineeringresearchAccordingtothespeedupandmaximizingofthes

2、hipmainengine，thedemandofbetterisolationofmainenginesystemiSalsoheighteningTomaintainthemoderatevibrationandnoiselevelofmainengine，therearesomeusualmeasurestomakethat，whichincludesthemono—layerisolationsystem，doubledecki

3、solationsystemandfloatingraftisolationsystem，meanwhile，includestheinitiativeisolationanddampisolationtechniquesThefloatingraftsystem，asaneffectivemeasuretocontrolvibrationhasbeenusedintheabroadshipsandobtainedawellisolat

4、ion，buttherearemanymachineunits，andthewholesystemiscomplex，sothevibrationoffloatingraftsystemisnotasimpleproblem，andtheestimatingofisolationisalsoahardworkHence，theisolationeffectoffloatingsystemneedstobcresearchedmore，t

5、obettertheisolationofthemainengineisolationsystemAtthesametime，thestudyCanoffermorecompleteandvalidscientificproofsforotherisolationsTheComputerAidedEngineeringhasdevelopedrapidlyandthefiniteelementmethodcarlbewhat’Smore

6、，theexactresultscouldalsobeusedtosolvemanyengineeringproblems，gainedbythenumericalcomputationforsomevibrationproblemsinacomplexsystemThemodelofafloatingraftisolationsystemwithtwomachineunitsisbuilttomasterthecharacterist

7、icfactorsofthefloatingraftsystem，whichaimsatthefloatingisolationsystem，basedonlawresearchingandcharacteristic—seeing，Inthispapertwofactotswereanalyzed，includingtheaddedmassoffloatingraRbodyandtheforcesofdoublemachinesont

8、hefloatingraftTostudytheeffectoftwofactorsonthefloatingraftisolationsystem，thevibrationisolatorwasmodeledbyspringelement，themachinebodyandfloatingraftbodyweremodeledbystructurebodyelement，andtheaddedmasswasmodeledbythema

9、sselementinthefiniteelementmethodThenumericalresultsshowthatthefrequencyoffloatingraftisolationsystemdecreaseswiththeincreaseofaddedmassonthefloatingraftbodyandwhenasingleforcetakesaction，theresponseoffloatingraftbodyisa