Computed Natural frequency

Calculated natural frequency

Mode

HAWT

Shaft¹

Shaft²

Shaft¹

Shaft²

1

0.39971

1338.30

1346.95

1000.827431

1003.848837

2

0.48004

3970.55

3782.20

4003.309722

4015.395349

3

0.48283

8985.30

8998.85

9007.446875

9034.639535

4

0.60208

16,149.80

16,322.90

16,013.23889

16,061.5814

5

0.61122

24,256.80

24,429.55

25,020.68576

25,096.22093

6

0.85593

35,583.65

35,760.50

36,029.7875

36,138.55814