基于拓?fù)鋬?yōu)化方法的發(fā)動(dòng)機(jī)罩板結(jié)構(gòu)輕量化研究.pdf

1、同濟(jì)大學(xué)機(jī)械工程學(xué)院碩士學(xué)位論文基于拓?fù)鋬?yōu)化方法的發(fā)動(dòng)機(jī)罩板結(jié)構(gòu)輕量化研究姓名：華成申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：機(jī)械制造及其自動(dòng)化指導(dǎo)教師：劉海江20080301AbstractAbstractTodaytheoilresourceisbecomingfewerandfewerandwearepromotingenergyconservationallovertheworldSo，forthecarindustrytheresearchof

2、CarIightweighttechnologyhasbecomethe仃endofthetimesTheapplicationofCarlightweighttechnologywillreducetheconsumptionofoilresourcesevidentlyanditCanalsoimprovethedriveandmechanicsperformanceofthecalButtheresearchoftheCarlig

3、htweighttechnologyhasjustbeguninourcountryandtheapplicationhasgreatblindnessSoitisveryimportantforUStodosomeresearchaboutthecal“l(fā)ightweighttechnologyandthiswilldoalotofgoodforthedevelopmentofourcarindustryWemadethecareng

4、inehoodastheobjectoftheresearch，andusethetopologyoptimizationmethodastheguidetOrealizethestructureoptimizationandthelightweightdesignoftheenginehoodThepaperWasdividedintotwobigpartstheresearchofthestructuretopologyoptimi

5、zationtheoryandthestructureoptimizationdesignoftheenginehoodInthefirstpartweestablishedthemathematicalmodel，comparedthehomogenizationmethodandvariabledensitymethodanddevelopedthenormalprocessoftopologyoptimizationARertha

6、t，wealsointroducedtheshelltheoryinfiniteelementmethodInthesecondpartwerealizedthestructureoptimizationofthehoodwithHypermeshandOptistructsoftwareInthissection，wedividedthehoodmodelintosmallshellsfirstandthisisthebaseofth

7、efiniteelementcalculationandtopologyoptimizationdesignThen，weanalyzedthethreekindsofworkingconditionofthehood，solvedthestrain，stressandstiffnessanddevelopedthesolveprocessAtlast，wecarriedouttheoptimizationdesignThedesign

8、WasfinishedinthreewaysWecheckedalloftheresultandchosethebestoneThishelpedteducetheweightandimprovedthemechanicalcharacteristicofthehoodThesignificanceofthisresearchisthatitusedthemostusefulmethodanddevelopedthebasicproce