Table 9 Natural frequencies of the 2DTBC blade.

From: Free vibration optimization of 2D tri-axial braided composite fan blade with ANN-Anal-FEM-GA integrated model

Mode

Natural frequency (Hz), (modal testing)

Natural frequency (Hz), (optimization)

Error (%)

1

627.20

638.46

1.8%

2

2613.70

2645.53

1.2%

3

3201.20

3236.17

1.1%

4

3214.61

3245.04

0.9%

5

3615.71

3668.74

1.4%

6

4740.46

4805.06

1.3%

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