Shock and Vibration / 2019 / Article / Tab 2

Research Article

Dynamic Property Investigation of Sandwich Acoustic Black Hole Beam with Clamped-Free Boundary Condition

Table 2

Comparison of the first 30 natural frequencies obtained by the present model and FEM.

Natural frequencyPresent modelFEMError (%)

ω1121.65121.74−0.070
ω2142.21142.56−0.247
ω3751.74748.920.376
ω4869.24865.820.392
ω51765.81767.2−0.078
ω62050.42044.60.286
ω72331.92321.50.447
ω83493.53469.30.408
ω93895.33875.30.515
ω104298.94301.5−0.060
ω2113285132160.521
ω2214816147230.634
ω2316024159220.640
ω2416016159290.544
ω2517386172950.528
ω2617936178370.554
ω2719141190190.639
ω281913119352−1.143
ω2921105210230.390
ω3021224211180.501

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