固定式起重機支承圓筒回轉制動過程的動力學分析.pdf

1、武漢理工大學碩士學位論文固定式起重機支承圓筒回轉制動過程的動力學分析姓名：張兵申請學位級別：碩士專業(yè)：機械制造及其自動化指導教師：李勇智郭建生20090501武漢理下大學碩十學位論文AbstractThesupportingcylinderofthefixedcraneisoneoftheimportantloadingpartswhenthecraneworks，itsmechanicalcapabilityhasdirectinfl

2、uencetothenormaloperationofthewholemachineDothestaticcalculationsforsupportingCylinderthemaximumloadsthatmayoccurinavarietyofworkingconditionsaretakenintoaccount，theintensityandmeettheneedofdesignthesupportingcylinder’Ss

3、trength，stiffnessmeettherequirementsHoweverfeedbackfromtheportsindicatesthatintheconditionsofafixedcrane’shoistingthecargosuddenlyfromthegroundorsuddenlyunloadingintheair，therevolvingsystemandLuffingsystem’Ssuddenlybraki

4、ngorjump—starting，thesupportingcylinderwillvibrationobviouslywithlargeamplitudeInthestrengthcalculation，thisdistinctdynamiceffectisreplacedbysafelycoefficientThetreatmentoftransformingacomplicateddynamicsystemintoasimple

5、andmanmadestaticsystemCan’treflecttheessenceoftheproblemaccuratelyIntheanalysisandcalculation，thetransformingthedynamicproblemintoastaticproblemismainlyduetothecausationandinfluencefactorsofthedynamicloads’emergenceiscom

6、plex，anditisdifficulttofitthedynamicloadsAimataboveproblems，thispapertakesthetheGQ4525fixedcrane’Ssupportingcylinderasaasanexample，basingonfiniteelementanalysisandmechanicaldynamicsUtilizingANSYS100tostudythedynamicchara

7、cteristicsofthesupportingcylinderandthethelawofdynamicresponseThemainresearchisasfollows：(1)AccoddingtotheconfigurationandworkingprincipleofthefixedcraneusingthefiniteelementanalysissoftwareANSYStoestablishsthemodeofmach

8、ineandmakingthestaticanalysisundertheconditionsoffullloadsCombiningwiththecranestructuretheorytoanalyzetheresults(2)Studyingthedynamicscharacteristicsofthefixedcrane，makingthemodalanalysisofthemodel，extractingthefirst4na