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

Table 2

First nine natural frequencies of the cantilever beam (Hz).

Mode
		4.3215	27.0825	75.8320	148.6018	245.6547	366.9808	512.5964	682.5270	876.8127
	Case A	4.3015	27.0652	75.8226	148.3884	244.9609	365.8909	511.6364	682.1218	876.5873
	Case B	4.2839	27.0609	75.7680	148.0051	244.2443	365.3559	511.5336	681.6345	874.4623
	Case C	4.2622	27.0418	75.5330	146.9672	242.4664	364.0223	511.2618	680.6097	869.8996