Structural Damage Localization in Plates Using Global and Local Modal Strain Energy Method

Table 1

Variations of natural frequencies (Hz) according to the mesh sizes of the intact plate.

Mode	Mesh size
	20%	10%	5%	4%	2%	1%
1	106.1	107.5	107.0	106.9	106.8	106.9
2	163.5	158.5	157.1	157.0	156.5	156.7
3	213.6	202.3	199.5	199.1	198.8	198.6