輸流管道振動(dòng)特性的實(shí)驗(yàn)研究.pdf

1、沈陽(yáng)航空工業(yè)學(xué)院碩士學(xué)位論文輸流管道振動(dòng)特性的實(shí)驗(yàn)研究姓名：梁峰申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：機(jī)械設(shè)計(jì)及理論指導(dǎo)教師：金基鐸20060201沈陽(yáng)航空工業(yè)學(xué)院碩士學(xué)位論文AbstractThispaperdescribesanexperimentalinvestigationofvibrationcharacteristicsofclamped—clampedandclampedpinnedpipesconveyingfluidItinclud

2、esthestudybothontheparametricresonancesofthepipesconveyingpulsatingfluidandontheforcedvibrationsofthepipes(withsteadyflow)underthemotionexcitationofthesupportingbases，Thebrieftheoreticalanalysisfortheparametricresonances

3、ofthepipesconveyingpulsatingfluidhavebeenperformedfirstAccordingtothecharactersofresponsesoftheparametricresonanceswhicha!efoundinournumericalanalysis，anuncouplingequationofmotionofthefirstandsecondmodesisobtainedTheequa

4、tionissolvedbyusingtheharmonicbalancemethodtoobtainanapproximateformulaofsolutiontotheresponcesoftheparametricresonancesTheanalyticatsolutionsobtainedarecomparedwiththosegivenbynumericalanalysis，anditisfoundthatthetwores

5、ultsareingoodagreementOnthefirstexperiment，thefirstmodeparametricresonancesofclampedclampedandclamped—pinnedpipesconveyingpulsatingfluidaleinvestigatedUnstableregionsofseveralpipesareobtainedexperimentallyandtheyalecompa

6、redwiththetheoreticalresultsItCallbeseenthatnotonlytheexperimentalresultsofdifferentpipesareaccordantqualitativelytheyalebutalsoingoodagreementwiththetheoreticalresultsqualitativelythoughthecharacteristicsofpipesarediffe

7、rentOnthesecondexperiment，vibrationcharacteristicsofclampeddampedandclampedpinnedpipesatdifferentflowvelocitiesandfrequenciesofforcedvibrationsaleinvestigatedDifferentmotionsofpipesandthecorrespondingrangesofthefrequenci

8、esareobtained，andSomerulesaresummarizedTheserulesarealsocomparedwiththenumericalsimulationresults。anditshowsthattheyaleingoodagreementqualitativelyKeyword：Pipesconveyingfluid；Characteristicsofresonances；Experimem；Pulsati