Free Vibration Exploration of Rotating FGM Porosity Beams under Axial Load considering the Initial Geometrical Imperfection

Table 7

The dependence of the first six nondimensional frequencies of the FGM beam on the axial compressive load , L/h = 20, n = 2,  = 5,  = 0.2, and r/L = 1.

BC
		S-S	0	0.2459	0.7852	1.6037	2.6985	4.0216	5.4763
0.4	0.2264		0.7623	1.5790	2.6733	3.9965	5.4526
0.8	0.2050		0.7387	1.5540	2.6477	3.9712	5.4287
1.0	0.1934		0.7267	1.5413	2.6349	3.9585	5.4167
C-C	0	0.4504	1.1345	2.0846	3.2947	4.6596	6.0366
	0.4	0.4382	1.1165	2.0641	3.2731	4.6382	6.0169
	0.8	0.4256	1.0982	2.0434	3.2515	4.6167	5.9972
	1.0	0.4192	1.0889	2.0330	3.2406	4.6060	5.9873