Research Article

A Unified Spectro-Geometric-Ritz Method for Vibration Analysis of Open and Closed Shells with Arbitrary Boundary Conditions

Table 4

Comparison of the first five nondimensional frequency parameters for an open cylindrical shell with C-F-C-F boundary condition.

Modes
Ref. [29]Ref. [37]PresentRef. [29]Ref. [37]PresentRef. [29]Ref. [37]Present

30°10.1200.1200.1200.0460.0460.0460.0250.0250.025
20.1690.1690.1690.0540.0540.0540.0280.0280.028
30.2810.2800.2810.1000.1010.1010.0590.0590.059
40.3300.3270.3310.1320.1320.1320.0660.0660.066
50.3380.3370.3390.1670.1670.1670.0940.0950.095

60°10.1420.1410.1420.0610.0610.0610.0310.0310.031
20.1530.1510.1530.0680.0690.0690.0540.0540.054
30.3050.3000.3050.1180.1190.1190.0740.0740.075
40.3050.3030.3050.1280.1290.1290.0780.0780.078
50.3080.3030.3090.1850.1870.1880.1060.1060.106