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

Table 12

Fundamental frequency of vibration 𝜆₁ of DWCNTs with different boundary conditions between inner and outer tubes and for 𝜂₀[0.1−−0.5].

𝜂0	SS-SS inner; Cl-SS outer	SS-SS inner; Cl-Cl outer	SS-SS inner; Cl-Fr outer	SS-SS inner; Cl-Sl outer
0	24.567	35.558	24.564	35.408
0.1	23.304	33.683	23.303	33.684
0.2	20.346	29.187	20.346	29.188
0.3	17.204	24.504	17.204	24.504
0.4	14.537	20.597	14.537	20.597
0.5	12.426	17.543	12.426	17.543