机械伤害-事故树案例大全.doc

1）用布尔代数简化事故树，求其最小割集。 事故树的函数表达式为： T=A1＋A2 = B1B2+ A2 =（X1+X2+X3+X4）（X5+X6+X7）+（X8+ X9+X10+ X11） =X1X5+ X2X5+ X3X5+ X4X5+ X1X6+ X2X6+ X3X6+ X4X6+ X1X7+ X2X7+ X3X7+ X4X7 + X8+ X9+X10+ X11 得到机械伤害事故树最小割集，即： K1={ X1X5}；K2={ X2X5}；K3={ X3X5}；K4={ X4X5}；K5={ X1X6}；K6={ X2X6}；K7={ X3X6}；K8={ X4X6}；K9={ X1X7}