飞机水上迫降的运动特性分析和讨论

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1、AbstractSineelast20s，designersofmarineaircrafthavefocusedonditchingcha“峨er砖tics．Athst60s，ditchinghasbeenintroducedintoairworthinessregulationbycivilaviationadministrationofeachcountry．Thus，problemsofa备cmRs’performancesafetydtringditchingneedtobesolved，inordertosucceedmtiona

2、lairHworthinessvalidation．Whilestudyingperformancesafetyofaircraftsduringditching,therearethreeeValuationstoconfirmthatditchingissuccessful：1．whetherdeformationanddynamicattitudeofstrmtlxeaffectseriouslypassengers’escape；2．whethercrewandpassengerscanaffordoverloadofwaterimp

3、act；3．whetherthereisenoughtimeforCreWandpassengerstoescapefromcabin．Inordertoexamineandapprovethethreeevaluationsabove，itisnecessarytogetdeepunderstandingaboutditchingcharacteristics(suchas，waterimpactbad，crashworthinessandfloatationperformance)．Amongthem,waterimpactbadandc

4、rashworthinessaremaincontentspresertedinthepaper．Actually,interactionbetweenwaterandaircraftisaclassicalinterdiscplinaryproblemoffluidmechanicsandsolidmechanics，andfluid·solidinteractionreferstonon-linearbehavioroffluid．It’thepremiertodescribefluidboundaryandsimulatethecoup

5、lingforcebetweenfluidandsolidforsolvingwaterimpactproblem．Themainaimofthispaperistobuildditchingmodelforcomputation．WithintroducingALEmethodtodescribefluidboundaryandpenaItycouplingmethodtodefinefluid．solidinteraction,ditchingissimulatedbymeansofexplicitdymrnics．Bysimulatin

6、gtheditchingtestofsubscalemodelandcomparingexperimentalresuItswithnumericalresult,validationofthemethodisverified．Meanwhile，regularitiesofkeyphysicalparameters(e．吕angleofattack,overloadacceleration)havebeenanaly孺d．TheresearchresultshavebeenpresentedaSf0110WS：1．Basedonthedet

7、ailedinvestigationsofrelatedlitemttaes，geometricalm甜elofaircraflA320andrelateddataaleobtained．WntheUseofCADandCAEcodes，geometryofaircraftandnumericalmodelforditchinghasn武汉理工大学硕士学位论文beenmodeledsuccessfully．2．ByusingALEalgorithmandpenaltycouplingmethod，theinteractionbetweenai

8、rcraftandwaterissmcessfullysimulated．Comparedwithtest-experimentalresults，itcanbeo