Research Article
Analytical and Experimental Vibration of Sandwich Beams Having Various Boundary Conditions
Table 3
The five low natural frequencies for different boundary conditions (Hz).
| BCs | Mode | 1 | 2 | 3 | 4 | 5 |
| C-F | ABAQUS [14] | 327.40 | 1079.1 | 2138.0 | 2175.3 | 2216.4 | GDQ | 329.18 | 1083.22 | 2152.54 | 2201.58 | 2258.15 | QEM [13] | 329.66 | 1088.43 | 2164.59 | 2183.78 | 2225.72 | HQEM (full [M]) [14] | 327.82 | 1082.4 | 2153.9 | 2175.9 | 2217.9 |
| C-C | ABAQUS [14] | 839.92 | 1956.7 | 2255.6 | 2702.6 | 3477.8 | GDQ | 844.17 | 1976.58 | 2274.56 | 2709.82 | 3541.27 | QEM [13] | 848.71 | 1988.13 | 2262.66 | 2725.13 | 3563.96 | HQEM (full [M]) [14] | 844.03 | 1978.1 | 2257.1 | 2717.5 | 3547.5 |
| S-S | ABAQUS [14] | 618.56 | 1349.1 | 1503.3 | 2170.4 | 2358.4 | GDQ | 619.05 | 1348.25 | 1508.81 | 2212.64 | 2413.09 | QEM [13] | 622.22 | 1352.86 | 1515.45 | 2176.86 | 2369.77 | HQEM (full [M]) [14] | 618.91 | 1349.3 | 1508.2 | 2171.2 | 2362.3 |
| F-F | ABAQUS [14] | 1290.2 | 1366.9 | 2153.7 | 2169.2 | 2214.6 | GDQ | 1292.10 | 1366.87 | 2197.87 | 2203.86 | 2245.86 | QEM [13] | 1299.19 | 1372.39 | 2162.80 | 2176.40 | 2225.19 | HQEM (full [M] [14] | 1291.8 | 1367.6 | 2154.2 | 2170.1 | 2215.2 |
| S-C | ABAQUS [14] | 715.45 | 1714.4 | 2196.4 | 2514.4 | 3117.1 | GDQ | 717.25 | 1725.64 | 2233.9 | 2541.3 | 3157.28 | HQEM (full [M]) [14] | 717.18 | 1725.8 | 2197.5 | 2521.2 | 3160.7 |
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