八.f3E’=√3E/5m3=0746√EI/m13;T=8.1lVm3/EI 九。S1m12X1+612m2O2X2=X1 2m1aX1+2 (13、、8yX2=0 6yX1+(1-4)X2=0 61 51=2=2/E; 62=81=P/6E/; -1/4 1/41- 0x1=5/4;2=3/4 Smy3;a-=1095VEm;0=21:=144EB/my D=0 EI x八． ; EI / ml . EI / ml ;T . ml / EI EI l f 3 3 3 3 3 5 0 7746 8 11 3 5 =  = = = 九． 2 1 2 1 12 2 2  11m1 X + m  X = X 2 2 2 1 22 2 2  21m1 X + m  X = X 设 2 11 1 1    m = 1 0 1 0 1 2 11 21 2 11 12 1 + − = − + = X ( )X ( )X X       l / EI; l / EI; 6 2 3 12 21 3 11 22 = = = =     0 1 4 1 1 1 4 = − −   / / 1 = 5 / 4;2 = 3 / 4 3 3 2 2 2 3 3 1 2 1 1 095 2 1 414 5 6 ; . EI / ml ml EI ; . EI / ml ; ml EI  =  =  =  = ; X X ; X X 1 1 22 12 21 11 = = −