基于ANSYS的斜拉桥恒载索力优化

[]20040609[](1978),,,,ANSYS,,,(,610031)[],ANSYSAPDL,[]ANSYS;;;[]U448.27[]A[]10021205(2006)02010903OptimizationofInitialCableForcesbasedonANSYSSoftwareinCable2stayedBridgesunderDeadLoadsCAOFahui,LIQiao,LIUQinghua,LIGuixun(DepartmentofCivilEngineering,SouthwestJiaotongUniversity,Chengdu610031,China)[Abstract]Fromthepointofviewofstructuraldesignoptimization,thispaperpresentsthedeterminationofinitialcableforcesincable2stayedbridgesuderdeadloads,usingdesignoptimizationofANSYS,onelarge2scalefiniteelementsoftware,combinedwithitsparametricdesignlanguage(APDL).Finally,thefundamentalprocedureisapplied.[Keywords]ANSYSsoftware;cable2stayedbridges;Initialcableforces;designoptimizationANSYS,,,ANSYS,ANSYS1ANSYS,:ANSYSANSYS,3:,,,,,,,,:ANSYS,,,,,,,31,220064CentralSouthHighwayEngineeringVol.31,No.2Apr.,2006,,,,,,,ANSYS2:()()(),,,,ANSYS,,22.1:,,U=sM2(s)2EIds(1):Ug=gM2(s)2EIds;Ut=tM2(s)2EIds:U=Ug+Ut:,::minU({x})::{X}l{Xj}{X}u(j=1,2,,n):{S}l{Sj}{S}u(j=1,2,,m),:P(X,q)=f(x)+nj=1Px(Xj)+qmj=1Ps(Sj)(2):PxPs,(),:X(j+1)=X(j)+sjd(j):X(j+1)X(j)j+1j,sj,d(j)j:f(j)-f(j-1),f(j)-f(b):f(j)f(j-1)jj-1,f(b),2.2,,ANSYS,,ANSYS,(1),ANSYS,APDLAPDLANSYSANSYS,,,,,APDLANSYS,,ANSYS(1)APDL,(Beam3,2,9),(1),:abf(x)dx=h3f(a)+f(b)+2m-1k=1f(x2k)+4mk=1f(x2k-1)(3):h=b-an01131,,,,APDL():1:File:model.datT1=500.0T2=500.0!,Pprep7!,et,1,beam3keyopt,1,9,1Psolu!cmsel,s,girdersfbeam,all,1,pres,50!bfe,159,temp,,-T1P12!solvePpost1!etable,mi,smisc,6!etable,mm,smisc,12etable,mj,smisc,18etable,N,smisc,1!etable,smaxi,nmisc,1!etable,smaxj,nmisc,3!()3GET,fga,ELEM,1,ETAB,MI!Ug3GET,fgb,ELEM,110,ETAB,MJUg=(fga332+fgb332)30.5P33do,i,1,109,13get,mzj,elem,i,etab,mjUg=Ug+mzj332P33enddo3do,i,1,110,13get,mmi,elem,i,etab,mmUg=Ug+mmi332P1.53enddoU=UgP(2.3e734)+23Ut35P(2.2e7320)!Fini2File:cableopt.txtPoptopclrfiniPinput,model,datPoptopanl,model,datopvar,T1,dv!opvar,smax,sv!opvar,U,obj!optype,subp!opsubp,30!opexe!3,[3]1,1,5ANSYS2,,,1(:m)Figure1Computationalmodelsofcable2stayedbridges(unit:m),,,,,,2,,(115)1112,:ANSYS,,B,,,8,,,,,,,,8,,,,3,,,,[][1]JTJ00197,[S].[2]JTJ07494,[S].[3]GB57681999,[S].[4]USTransportationResearchBoard[Z].HighwayCapacityManual.2000,Washington,D.C.,USA.[5].[M].:,2005.(111),,,ANSYS[3]1([3],,),15921Table1ThecontrastofcomputationalresultskN[3]ANSYS[3]ANSYS15918041784.116613891368.3160553.4536.33167476.9447.52161614.1619.67168925.1916.75162511526.28169511526.28163925.1916.75170614.1619.67164476.9447.52171553.4536.3316513891368.317218041784.12(:kNm)Figure2Finalmomentcurves(unit:kNm)4,ANSYS,,,ANSYSAPDL,,,[][1]ANSYSAPDLProgrammersGuide[M].SASIP,Inc,1998.[2],.ANSYS[M].:,2002.9.[3],.[M].:,2001.[4].[M].:,1998.[5].[J].,2004,(2).5112,: