Weibull_Reliability_Analysis 威布尔分布(韦伯分布)可靠性分析

Weibull Plot
y = 2.288x - 10.02 R² = 0.974
23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
0
-0.5
-1
-1.5
-2
百度文库
-2.5
-3
-3.5
0
1
2
Weibull Analysis
No. 序号 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
ln(ln(1/(1-median rank)))
0.5 1 1.5
威布尔分析
55
Enter cycle number or time failed 输入失效的周期或寿命 60 80 70 80 66 100 110 130 90 23 23 56 23 34
2.29
Characteristic Life, Alpha: The number of cycles at which 63.2% of the product will fail 63.2%的产品失效时的寿命:
80
Reliability at 55 cycles 可靠性在 55 个周期
65.3 %
Rsquare is 0.97, equal to or greater than 0.9, the fit is acceptable. R平方为 0.97, 等于或大于0.9, 拟合可以接受.
Enter the minimum number of cycles or life expected: 输入期望的最小周期(寿命):
Enter the percentage expected: 输入期望合格率:
80 %
Shape Parameter, Beta: Infant life failures (< 0.8), wearing out (> 1.2), or constant failure rate (0.8~1.2) 图形参数, Beta. 早期失效(<0.8), 耗损失效(>1.2), 偶然失效(0.8~1.2)
3
4
5
6
ln(cycles)
Conclusions: 结论:
The product will not meet the desired reliability of 80 % at 55 cycles. 产品达不到期望的可靠性80%在55周期.
The Shape Parameter, Beta is 2.29 , greater than 1.2, indicating that the product is experiencing normal wear out failure rate. 图形参数, Beta 为 2.29, 大于1.2, 说明产品是正常耗损失效.