夹芯板弯曲屈曲分析的有限条 棱方法

-(710055):-,,,:FLEXURALBUCKLINGANALYSISOFSANDWICHPANELSBYFINITESTRIP2PRISMMETHODWangHaizhongHeBaokang(CivilEngineeringInstituteofXianUniversityofArchitectureandTechnologyXian710055)Abstract:Flexuralbucklinganalysisofsandwichpanelswiththin2walledcold2formedsteelprofiledfacesandafoamedcoreiscarriedoutbyfinite2strip2prismmethod.Thebucklingcriticalstress,bucklingloadandbucklinghalfwavelengthofthecompressedfaceinsandwichpanelsarepresented,thetheoreticalvaluesandtheexperimentalvaluesarecompared,andtheyareingoodagreement.Keywords:sandwichpanelthin2walledcold2formedsteelfoamedcoreflexuralbucklingcriticalstressbucklingload:19662:2002-05-20,,,,,,,,,,,1-,,(),()-,,,2,,,,(ij)1,::Fsm={UimVimWimMimUjmVjmWjmMjm}T:sm={uimvimwimimujmvjmwjmjm}T1ij:u=rm=1,21-xbuim+xbujmsinkmzv=rm=1,21-xbvim+xbvjmcoskmz:w=rm=1,21-3x2b2+2x3b3wim+x-2x2b+x3b2im+3x2b2-2x3b3wjm+x3b2-x2bjmsinkmz,km=mL,uim,vim,wim,im,ujm,vjm,wjm,jmm,(ij),S(o)m,ij15IndustrialConstruction2002,Vol132,No11120023211€z,S(g)m,:S(o)m+€zS(g)m:CT[S(o)m+€zS(g)m]C,C,S(o)m,S(g)m[1]322:u=rm=1Ckukmsinkmzv=rm=1Ckvkmcoskmzw=rm=1Ckwkmsinkmz,Ck;ukm,vkm,wkmkm,3,:3Ci=14(1+i)(1+i)(i=1,2,3,4),:[Spmn]ij=[Bi]Tm[Dp][Bj]ndv:[Bi]m=5Ci5xsinkmz000-Cikmsinkmz0005Ci5ysinkmzCikmcoskmz5Ci5xcoskmz005Ci5ycoskmzCikmcoskmz5Ci5xsinkmz05Ci5ysinkmz[Dp][2]4,,,-,,,:Spm+CT[S(o)m+€zS(g)m]C=0-Sm,cr(m=1),L,,L,,51123456Pmm170017001700150015001500Pmm303040403030PMPaPNPmm277102771028619287162771627716283192821829118293152881328510P019760197901983019800196301974153818153818189116212010174712174712161017159612193810223010178913180616P019550196401976019510197601967232323232323202222202120P111511051105111511101115(60)2520023211,,,,,,,,,,,5,,,,,,,,,,;,,(),,,,Force2Finding,,,,,,,,,,,6,,1..:.20002,..,2000,6(2):24293,..:.20004,..:.20005..:.2000(52)-,[3],,1-4,:t=014mmE=21055105MPaG=71904104MPa=013,A1=3113610-4mm2A2=2166410-4m2,I1=61170510-8m4I2=3155210-12m4,EC=6150MPaGC=2191MPaC=01117,b=01666m421,[4]6,,,,-,,,,[4],,,-1MurrayNW.IntroductiontotheTheoryofThin2WalledStructures.NewYork:OxfordUniversity,1984.1932292ChuengYK.FiniteStripMethodinStructuralAnalysis.Pergamon,19763,,..,1999,14(4):41454.:[].:,20010620023211