Performance of Fitness Functions Based on Natural Frequencies in Defect Detection Using the Standard PSO-FEM Approach

Table 3

Evaluation of the performances of four fitness functions for three defect cases.

Damage case		Fitness function
		Case A	Success rate	0.5	0.49	0.03	0.97
Mean iterations	37.4800		37.1224	39	46.1443
CPU time	234.5140		232.2411	366.1968	101.1231
Case B	Success rate	0.23	0.4	0	0.96
	Mean iterations	92.6522	90.5250	NaN	89.8125
	CPU time	494.0094	429.0095	548.8929	270.3995
Case C	Success rate	0.09	0.08	0	0.28
	Mean iterations	139.7778	126.1250	NaN	120.0000
	CPU time	730.5601	743.1865	766.6580	718.9975