,,,,,1,2,:ba,c,rn,X=[X1,X2,X3,X4]T=[a,b,c,rn]Tf(X)=2c(R2-r2b)/3+Np(a+b)hnL/2(1)RrbNphnL2211,Lim-(CLimLim)2+(C)2ZR(2)CCLimLimLim-(CLimLim)2+(C)2ZR(3)LimCLimCLim212(1)210mmls-Dac10(4)(2)0116Acbc0128Acb(5)(3)015Rrn0185R(6)(4)10a200(7)10b200(8),14,711%,,,,,,;,::15:230022:2003-03-07342003(12)©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:;;;Abstract:Stiffnessandstrengthofupperandlowerleafspringassemblyofthefrontsuspensioninanewcompositelypow2eredtractionvehiclearecalculatedrespectivelywiththeANSYSfiniteelementanalysissoftware.Theresultsareverifiedbytests.Keywords:steelleafspring;stiffness;strength;finiteelementanalysis,2,,,2,ANSYS,111213141516171813,P=10kW,n=750r/min,i=716,AcA=57mm,B=28mm,,=01026245,R=80mm,rb=20mm,Np=3,ZR=112816(011),Matlab,:a=10mm,b=14mm,c=9mm,rn=63mm4,,1,11,1990,16(2)211,1996,25(4)311:,2002::610031442003(12)©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.