个LY ROY RAY个 B A FY Y: Roy +Ray +Ly=Fy RAy×OA+Ly xOC=F×OB R4y=-4.51b Ror=-1421b 个L2 ROZ木 RAZ木 小FZ B 一X Z: Roz +Lz+Riz+F2=0 Lz×OC+R2×OA+F2×OB=0 R42=-413b Roz =-35lb R=VRz+Rm=V(-35)}+(-142)2=146b R4=√R2+R3y=V(-413)+(-4.51)2-413b Combined reliability is 0.92 Single reliability is 0.92 =0.96 30000×60×300 106 540Y: Z: 0 0 OZ Z AZ Z Z AZ Z R L R F L OC R OA F OB           413 35 AZ OZ R lb R lb             2 2 2 2 2 2 2 2 35 142 146 413 4.51 413 O OZ OY A AZ AY R R R lb R R R lb               Combined reliability is 0.92 Single reliability is 0.92  0.96 OY AY Y Y AY Y Y R R L F R OA L OC F OB         4.51 142 AY OY R lb R lb     6 30000 60 300 540 10 Dx    