Fatigue Reliability Sensitivity Analysis of Complex Mechanical Components under Random Excitation

Table 1

Ratio of load and cyclic number of each load grade.

Load grade (i)	Radio of loads (𝐹𝑖/𝐹1)	Radio of cycles (𝑛𝑖/𝑛1)
1	1	1
2	0.95	106
3	0.85	6834
4	0.725	174,620
5	0.575	611,563
6	0.425	201,936
7	0.275	4927
8	0.125	13