Table 2 A comparative study of the natural frequencies of an FG cylindrical shell.

From: An analytical study of sound transmission loss of functionally graded sandwich cylindrical nanoshell integrated with piezoelectric layers

Power law index \((\lambda )\)

Mode number (\(n\))

Present

Ref.95

0

1

19.905

12.917

2

31.578

31.603

3

88.002

88.267

1

1

13.189

13.234

2

32.267

32.418

3

90.345

90.569

2

1

13.317

13.344

2

32.549

32.683

3

91.066

91.309

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