Table 8 The first ten natural frequencies (Hz) of the CCCC angle-ply [θ/-θ/θ] laminated plate-trapezoid cavity coupled system.

From: Isogeometric modeling and vibroacoustic analysis of a symmetrically laminated thin plate coupled with an acoustic cavity

θ

Object

Medium

Mode order

1

2

3

4

5

6

7

8

9

10

15°

Laminated plate

Vacuo

171.55

210.86

275.64

363.13

452.02

464.61

503.23

554.60

612.95

655.18

Plate-ITC

Air

120.23

171.31

210.71

239.90

276.57

351.12

369.70

423.38

445.03

449.45

Water

31.46

59.15

93.04

135.91

147.94

164.63

185.83

196.15

228.64

255.88

Plate-RTC

Air

116.24

171.13

210.33

233.18

275.50

346.21

364.66

425.33

439.88

449.01

Water

31.48

59.22

93.18

136.11

147.96

164.70

186.03

196.37

228.87

256.18

30°

Laminated plate

Vacuo

280.72

308.85

354.88

417.54

495.40

586.91

689.64

758.75

796.74

799.20

Plate-ITC

Air

120.89

240.30

279.79

306.14

352.74

358.73

416.02

424.45

446.73

466.79

Water

45.61

78.11

109.62

145.75

188.42

237.48

247.81

262.44

285.47

296.55

Plate-RTC

Air

116.81

232.65

279.75

305.60

348.67

353.71

414.37

426.43

441.72

465.19

Water

45.64

78.21

109.79

145.96

188.67

237.75

247.83

262.56

285.73

296.85

45°

Laminated plate

Vacuo

477.48

490.56

513.53

547.54

593.40

651.40

721.36

802.82

895.19

997.81

Plate-ITC

Air

121.15

241.54

358.92

418.12

439.00

462.35

485.32

492.94

494.14

526.33

Water

69.30

111.96

143.56

174.44

208.26

246.36

289.66

338.26

392.48

426.55

Plate-RTC

Air

117.04

233.73

349.09

419.59

434.52

462.12

475.60

489.53

493.19

518.53

Water

69.36

112.15

143.80

174.70

208.54

246.66

289.99

338.59

392.85

426.61

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