Nonlinear Vibrations of 3D Laminated Composite Beams

Table 1

Natural frequencies (Hz) of clamped-clamped beam of asymmetric cross ply [0°/90°/0°/90°].

Mode	Clamped-Clamped
	Present	Reference [8]	Reference [32]	Reference [33]
1	1053.9	1054.4	1062.2	1051.8
2	2596.9	2509.2	2612.0	2505.4
3	4292.1	4281.5	4293.7	4265.1
4	6314.5	6215.8	6309.0	6150.3
5	8271.0	8239.9	8245.7	8062.5