筒倉動態(tài)側(cè)壓力及其地震反應(yīng)的顆粒流數(shù)值模擬.pdf

1、河南工業(yè)大學碩士學位論文筒倉動態(tài)側(cè)壓力及其地震反應(yīng)的顆粒流數(shù)值模擬姓名：何迎春申請學位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：王振清肖昭然20060501河南T業(yè)大學頗j學位論文AbstractSilos，acylinderwhichisusedtostoregranularmaterialsandcandischargematerialsaccordingtothestipulation，arealreadyappliedwidelytov

2、ariousdepartmentsoncoal，grains，minerals，buildingmaterialsandsooilAsilo’spressureisalwaysconcernedbymanyscholarsinvariouscountriesThemostvitalcontentsare：oneisthestaticlateralpressureofstoringanddynamiclateralpressureofdi

3、schargingagainstoffthewallsofsilo；theotherisvariousresponsesofasilounderearthquake，whichismainlyconsideredtheinfluenceofgranulartowallofsiloThetwomaincharacteristicsoflateralpressureonwallsofsiloare：1themediumandflowprop

4、ertiesofgranularmaterials；2thelateralpressureismainlydecidedbytheactualgravitystressofgranularThemethodofresearchinglateralpressureonwallsofsiloshouldnotonlyconsidersthemediumandflowpropertiesofgranularmaterialsbutalsoco

5、nsiderstheactualgravitystressofgranularHowevertheseismicresponseofasiloinvolvestothedynamicpropertyandco—actionofsolidandgranularwhicharesignificantlynonlinearanduncertaintyThesiloscalemodelinPFCbasedonthedistinctelement

6、hasbeenestablishedwhichdonotonlyconsidersthemediumandflowpropertiesofgranularmaterials，butalsoconsiderstheactualgravitystressofgranularintheprototypesilowhilenumericallysimulatingDuringthenumericalsimulationontheseismicr

7、esponseofasilotheinfluenceofthemediumpropertytothemechanicsresponseofthesilo’sstructureisnotonlyconsidered，butthedynamicpropertyandco—actionofstructureandgranularisalsoconsideredFirstofall，thenumericalsimulationofthestat

8、iclateralpressureonthesiloscalemodel，andtheresultsarecomparedwithJanssen’ssolutionsoftheprototypesilo；Basingontheaccordantstaticlateralpressure，thedischargingprocessofthescalemodelissimulated，andthedynamiclateralpressure

9、，themaximumdynamiclateralpressureandthemagnitudeoftheoverpressurecoefficientareobtainedThen，severalfactorsrelatedtolateralpressureonwallsofsiloarecompared：1geometryfactors，whichincludeshatchsizeofhopperobliquityofhoppera

10、ndtheratioofthehightothediameterandsoon；2materialpropertyfactors，whichincludestheinternalfrictionangleofgranularthefrictioncoefficientbetweengranularandwallsofsilo，andthenormalgravityofgranularandsoonFinallythedisplaceme

11、ntresponseandvelocityresponseofthesiloundersuperpositionofharmonicloadandthehorizontalearthquakeaswellastheinfluenceofgranulartothesilostructurehavebeensimulatedKeywords：silo；PFC：dynamiclateralpressure；overpressurecoeffi