1、(1) T=x1*x3+x1*x5+x3*x4+x2*x4*x5所以最小割集表示的等效事故树如下:= 1* 2* 3+ 1* 4+ 3* 5Txxx所以最小径集表示的等效事故树如下:利用最小割集进行结构重要度分析:I ( 1) = + =11212I ( 2) =14I ( 3) = + =11212I ( 4) = + =141234I ( 5) = + =141234I(X3)=I(X1)I(X5)=I(X4)I(X2)利用最小径集进行结构重要度分析:I ( 1) = + =141234I ( 2) =14I ( 3) = + =141234I ( 4) =12I ( 5) =12I( 3
2、)=I( 1)I( 5)=I( 4)I( 2)xxx(2)q1=0.02,q2=0.01,q3=0.06,q4=0.03,q5=0.05T=x1*x3+x1*x5+x3*x4+x2*x4*x5P(T)=q1q3+q1q5+q3q4+q2q4q5-q1q3q5-q1q3q4-q1q2q3q4q5-q1q3q4q5-q1q2q4q5-q2q3q4q5+q1q3q4q5+q1q2q3q4q5+q1q2q3q4q5+q1q2q3q4q5-q1q2q3q4q5=0.02*0.06+0.02*0.05+0.06*0.03+0.01*0.03*0.05-0.02*0.06*0.05-0.02*0.06*0.
3、03-0.02*0.01*0.06*0.03*0.05-0.02*0.06*0.03*0.05-0.02*0.01*0.03*0.05-0.01*0.06*0.03*0.05+0.02*0.06*0.03*0.05+0.02*0.01*0.06*0.03*0.05+0.02*0.01*0.06*0.03*0.05=0.003917818(3)概率重要度:Ig(1)= =q3+q5-q3q5-q3q4-q2q3q4q5-q3q4q5-1q)( TPq2q4q5+q3q4q5+q2q3q4q5+q2q3q4q5=0.1051859同理:Ig(2)=0.001381800Ig(3)=0.048385300Ig(4)=0.059260600Ig(5)=0.019076360临界重要度:Ic(1)=Ig(1) =0.1051859* =0.53696q1P( T) 0.020.003917818同理:Ic(2)=0.003527Ic(3)=0.741004Ic(4)=0.453778Ic(5)=0.243456ff(1)f(1)f(1)