09-05U

Classical molecular dynamics simulations were used in a study of an oscillator, based on a $(9,0)@(18,0)$ double-walled carbon nanotube of $21\text {\r A}$ length. The obtained dependencies of amplitude and frequency on time in the range from $10\text {K}$ to $225\text {K}$ point out the distortions of system geometry as the main cause of friction. Internal system dynamics was studied, and an induction of longitudinal vibrations in nanotubes constituting the system were observed.