Mode shape

ANSYS

Chopra

Error (%)

Hong

Error (%)

Mode 1

27.516

26.268

4.53

26.375

4.15

Mode 2

102.405

105.073

−2.61

-

-

Mode 3

249.976

236.415

5.43

-

-

Mode 4

399.257

420.293

−5.27

-

-