Free Vibration Analysis of DWCNTs Using CDM and Rayleigh-Schmidt Based on Nonlocal Euler-Bernoulli Beam Theory

Table 11

Numerical comparison among [31] and CDM and the first three frequencies of vibrations of DWCNTs are reported (for 𝜂₀=0.1 and 𝜂₀=0.2).

𝐿	Mode	𝜂0=0.1		𝜂0=0.2
		[31]	CDM	[31]	CDM
14	𝜔1	0.8678	0.997	0.7103	0.866
	𝜔2	1.7807	2.381	1.1764	1.726
	𝜔3	2.7046	4.046	1.7232	2.583
18	𝜔1	0.5471	0.604	0.4328	0.524
	𝜔2	1.0966	1.459	0.7206	1.045
	𝜔3	1.6772	2.453	1.0936	1.563
24	𝜔1	0.3171	0.340	0.2446	0.295
	𝜔2	0.6247	0.822	0.4089	0.588
	𝜔3	0.9606	1.382	0.6379	0.879
28	𝜔1	0.2355	0.250	0.1800	0.2168
	𝜔2	0.4610	0.604	0.3013	0.432
	𝜔3	0.7103	1.016	0.4749	0.647