快锻液压机机架的有限元分析

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1、西北下业大学硕上学位论文本文研究的快锻液压机机架静动态、正偏载的应力分布规律及模态分析结果，为新式快锻液压机的设计提供了可靠的依据。关键字:快锻液压机，机架，有限元分析，静态，模态，动态，应力摘要巨里里里里巴日日....口巴口里里曰里毕.粤..巴里巴三巴三三巴里里里里里巴里巴宫巴里里里里里日日日盛日日日曰日公..里口.口里.里里里里里里里粤一思..里巴巴巴巴巴巴里巴里里里里里里里里里AbstractThehighspeedforginghydraulicmachine,whichismostimportantequipmentinpressurepr

2、ocessingfield,hasbecomeoneoftheequipmentswhichcannotbeshortageinindustrialproduction.Thispaperhascreatedthree-dimensionalfiniteelementmodeloftheframeof12.5MNtwincolumnspull-downhighspeedforginghydraulicmachinewhichisdesignedbyXi’anheavy-dutymachineryresearchinstitute,analysedth

3、estressanddisplacementdistributionlawsoftheframeunderstaticanddynamicload,anddonethemodalanalysisoftheframeonthebaseofstudyingtheoriesandfeaturesofthehighspeedforginghydraulicmachineandthestructuralfiniteelementmethod,whichprovidesreliabletheoreticalbaseandhasimportanttheoretic

4、almeaningandapplicationvalue.Themainresearchcontentsandresultsofthispaperasfollows:(1)Thethree-dimensionalgeometricmodel,mechanicalmodel,staticandtransientdynamicmodeloftheframearecreated.(2)Stressanddisplacementdistributionlawsoftheframeunderthreedifferentworkingstatesareobtai

5、nedthroughsimulatingthethreetypicalworkingstatesoftheframe,theyarenooffsetload,offsettingloadalongXaxisandoffsettingloadalongZaxis.Themaincalculationresultsare:thefourcornersoftheframearestrssconcentrateareas,thatistheyarethedangerouscross-sectionsoftheframe;Thestressanddisplac

6、ementdistributiontrendsarealmostsameunderstaticanddynamicload,butunderdynamicload,thelargeststressesofthedangerouscross-sectionsareincreasedbyabout40%;Offsettingloadhasagreateffectonthebridgeanduprightcolumnofhydraulicmachineandmakesthelargeststressofthedangerouscross-sectionin

7、creasedbyabout20%.(3)ThedynamicparametersoftheframesuchasprevioustennaturalIII西北一「业人学硕「学位论文frequenciesandcorrespondingmodesareobtainedthroughmodalanalyzingtheframeofhighspeedforginghydraulicmachine.Thesimulatingresultsindicate:Theframehasnotonlyforeandafter,up-downandleft-right

8、bendingvibration,butalsotwistingvibration.Thesevibrati