Improved Response Surface Method Based on Linear Gradient Iterative Criterion

Table 8

Calculation results of example 5.

Used method	Reduction coefficient	Iteration times	Failure probability	Reliability index	Relative error (%)
Monte Carlo method	—	—	0.0286	1.9012	—
Traditional response surface method	—	60	0.0258	1.9457	2.34
The proposed method	0.01	—	—	—	—
	0.05	—	—	—	—
	0.2	8	0.0259	1.9455	2.33
	0.4	8	0.0259	1.9455	2.33
	0.6	10	0.0259	1.9455	2.33
	0.8	16	0.0259	1.9455	2.33