超低空空投过程的仿真

:2002211204.:(19722),,;,(430074).:.():,.,.,.:;;;:V322.12;O241.82:A:167124512(2003)0420108203,,,,.,,,,.11[1].1,[2].,;,,ANSYS/LS2DYNA,.,.[3],(),,..2:2t,(2.252.60m),5m,(())2.0[4].150m/s;280m/s.,,,:a.,,x,y.b.().c.,,,[2].d.,..e.,.,[5].f.314()Vol.31No.420034J.HuazhongUniv.ofSci.&Tech.(NatureScienceEdition)Apr.2003,.:4.5m2.5m(),8#,0.5m,.4m2.5m2m.,(2).2.1(),,7m4m.,200m400m6m,,.2.2()2.22.2.1(),;,,,(1).1/kgm-3/GPa7800210.000.2380210.000.237800210.000.2315000.0080.30():s=8kPa,E=800kPa.;E;2.2.2(2):a.,;b.,.,,.,,;,.22f120.01220.30f()[6]2.2.3:,()20kN,,.2.0.:(),.:yz.,4m.x,y,z.3,,.341;562.3,,t;t1;t2;t3;v;(y,);;Syy;S;fxx;fyy.3y2t=4.57s,4y2t=1.852s,fy=597.8421kN.9014:5y2t=4.5s,6y2t=1.84s,fy=792.227kNa..,,,,,0.1m(0.0840m0.0878m),.2.0.3v/kmh-1180280t1/s0.9350.855/()1.601.99t2/s1.811.81/()3.400.57fx/g3.743.80fy/g30.5040.40S/m90.10226.00t3/s7.4010.30b..,,,,.c..(40.4g)(50g),.d.,,[1].,,,,,,,.:a.,;b.,;c.(),,;d.,;e.,.520.[1]KJ...:,1991.[2]OB,AT,MM...:2,1996.[3]BH,AT,OB...:2,1995.[4]EG,TW..,.:,1988.[5]..:,1997.[6],..:,1991.Simulationofairdroppingatasuper2low2altitudeYangXuesongWangChengLiZhenhuanAbstract:Anumericalsimulationfortheprocessofairdroppingforthedisasterreliefatasuper2low2altitudebyusingthedynamicfiniteelementmethodwasmade.Thecomputationalmodeloftheairdropprocesswasdeveloped,andthetypicalconditionsofrealairdropanditsprocessweresimulated.Thesecurityofair2drop,theloadingimpactandthedeceleratingeffectwereanalyzedbasedonthesimulationresults.Itpro2videdtheoreticbasisforthedesignofthesuper2low2altitudeairdrop,andanewvalidatingmethodforevalu2atingthefeasibilityoftheprojectandthereliabilityofairdropprocesswaspresented.Keywords:super2low2altitudeairdrop;deceleration;simulation;finiteelementYangXuesongPostgraduate;CollegeofCivilEng.&Mechanics,HuazhongUniv.ofSci.&Tech.,Wuhan430074,China.011()31