Table 6 Summary of the test data.

From: Modal analysis and design optimization of natural fibre-based sandwich structures for enhanced damping and stiffness

Run

Natural frequency(Hz)

Modal loss factor

Natural frequency(Hz)

Modal loss factor

Natural frequency(Hz)

Modal loss factor

Boundary conditions

CF

CF

SS

SS

CC

CC

1

79.84

0.0011

223.37

0.0024

510.61

0.0123

2

111.02

0.0038

309.67

0.0086

695.25

0.0396

3

138.38

0.0072

385.46

0.0161

855.42

0.0712

4

164.65

0.0103

458.19

0.0232

1010.45

0.1002

5

190.54

0.0129

529.92

0.0294

1164.95

0.1245

6

117.23

0.0043

326.71

0.0094

733.44

0.0415

7

158.73

0.0101

440.31

0.0231

959.83

0.0969

8

191.27

0.0164

528.99

0.0374

1131.97

0.1504

9

220.51

0.0219

608.79

0.0472

1287.79

0.1966

10

244.72

0.0098

663.47

0.0224

1309.55

0.0695

11

146.71

0.0078

407.19

0.0196

904.43

0.0777

12

198.37

0.0169

547.23

0.0405

1171.38

0.1561

13

236.91

0.0255

651.21

0.0603

1359.56

0.2251

14

265.37

0.0122

712.01

0.0274

1364.74

0.0817

15

294.42

0.0268

785.49

0.0597

1475.96

0.1694

16

171.71

0.0115

474.44

0.0318

1049.31

0.1132

17

232.78

0.0232

638.58

0.0591

1353.11

0.2108

18

272.74

0.0126

726.67

0.0291

1391.94

0.0848

19

307.78

0.0294

813.94

0.0665

1510.61

0.1826

20

339.97

0.0461

894.48

0.1039

1626.78

0.2766

21

193.77

0.0147

532.82

0.0727

1178.68

0.1447

22

259.47

0.0108

691.43

0.0273

1364.53

0.0781

23

307.28

0.0283

808.55

0.0796

1519.75

0.1819

24

346.97

0.0472

905.65

0.1099

1648.33

0.2864

25

382.55

0.0642

993.58

0.1488

1769.81

0.3802

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