Modelling a Cracked Beam Structure Using the Finite Element Displacement Method

Table 2

Comparison of the natural frequencies from the FEFM and proposed method for a cracked cantilever beam.

Crack		Mode	Natural frequencies obtained from FEFM [17] (Hz)	Natural frequencies obtained from the proposed method (Hz)	Difference (%)
X/L	a/h
0.2	0.13	The first mode	161.3	161.5	0.126
0.2	0.25		158.0	159.2	0.760
0.2	0.4		150.8	151.6	0.543
0.55	0.13	The second mode	1011.9	1011.7	0.025
0.55	0.25		994.9	989.8	0.523
0.55	0.4		960.7	947.6	1.350