單缸柴油機(jī)有限元設(shè)計(jì).pdf

1、江蘇大學(xué)碩士學(xué)位論文單缸柴油機(jī)有限元設(shè)計(jì)姓名：曹曉輝申請學(xué)位級別：碩士專業(yè)：動(dòng)力機(jī)械及工程指導(dǎo)教師：姜樹李20070526江蘇大學(xué)碩士學(xué)位論文usingsinglecylinderDieselengineasaspecificobjectthispaperanalyzesthecylinderblockassemblydeeplybythefiniteelementmethodTheoptimalstructuraldesignWagg

2、ainedaftermanyschemeswerecomparedTheanalysisofthedynamicsofthepistonandconnectingrodmechanismWascompletedtogettheforcesonthecylinderbodyThisanalysissolvedtheproblemhowtoconfirmtheboundaryconditioninFEAFinally，thefeasibil

3、ityofFEAWasvalidatedbythemodeexperimentAlltheseprovidesciencebasisandfeasibleplansforimprovingthereliabilityandreducingthevibrationoftheDieselenginefromthestructuredesignMainconten協(xié)andconclusionsinthepaperareasfollow：1Th

4、e3Dmodelofcylinderblockcrankshaftconnectingrodpistonand∞onwereset叩usingthesoftwarePro／EngineerThepartswenmeshedbyHypermeshofAmericanAltairCompany，thusensurethequalityofthemeshandthecontradictionbetweenthemeshquantityandc

5、alculationaccuracyWasSOlvedproperly2TheanalysisofthekinematicsanddynamicswereperformedforthepistonandconnectingrodmechanismofthedieselengineThecyclemovementtraceofthepistonandconnectingrodmechanismWasobtained麗也thedynamic

6、ssimulationsoftwareandthestrengthchangewithtimeofeachmajorpartinthemovementprocessWasobtainedThisprovidedtheboundaryconditionofforcetotheFEAanalysisofcylinderblock3ContactAnalysesofFEAWasusedforthecylinderblockassemblyIt

7、WasfoundthatthestressvaluesofoilgallerybalanceaxletreeholeandcylinderheadboltbolsterwerebiggerthanotherplacesSimultaneity，thereWasagreatcontrastoftherigiditybetweenthetwosidesofthecylinderblockTheoptionalschemeWasobtaine

8、dbyconsideringmanyfactorsInthisschemethestressconcentrationWaseliminated，andthestressdistributionofthecylinderblockWasimprovedTherefore，therigiditydifferenceofthetwosidesWasreducedandthedistortionofthetwosidestendedtobec

9、omealikeEspecially，thedistortionofthecoalescentplanebetweencylinderblockandcylinderheadWasdiminished4ThenaturalfrequencyofthecylinderblockWascalculatedThemodefiequencyandmodeshapewereobtainedThetotalrigidi哆andlocalintens