Crashworthiness Design and Multiobjective Optimization for Hexagon Honeycomb Structure with Functionally Graded Thickness

Table 4

Optimal solution under four cases.

Case-SEA (kJ/kg)	Surrogate model	SEA (kJ/kg)			PCF (kN)
		Prediction	FEA	Error (%)	Prediction	FEA	Error (%)
A-18.5	RBF	18.501	18.504	−0.02	17.332	17.379	−0.27
	RSM	18.498	18.646	−0.79	18.646	17.890	4.22
	KRG	18.493	19.419	−4.77	13.467	20.888	−35.53
B-20	RBF	20.007	20.084	−0.39	22.640	22.836	−0.86
	RSM	20.004	19.908	0.48	22.225	22.263	−0.17
	KRG	20.008	20.357	−1.71	17.052	23.989	−28.92
C-22	RBF	22.017	21.654	1.68	32.384	31.930	1.42
	RSM	21.999	21.484	2.40	32.991	32.571	1.29
	KRG	21.997	21.459	2.51	29.900	30.638	−2.41
D-24	RBF	24.000	24.050	−0.20	57.869	58.033	−0.28
	RSM	23.997	23.441	2.37	55.655	57.648	−3.46
	KRG	23.999	22.891	4.84	48.649	47.117	3.25