Abstract
用分子动力学方法研究了层间距对石墨振荡器振荡性质的影响。在分子动力学模拟中，采用Tersoff- Brenner势结合Lennard-Jones势描述碳原子之间的相互作用。计算结果表明：层间距对石墨振荡器振荡性质的影响非常明显，随着层间距的增大石墨振荡器振荡的能量损耗越来越小。当石墨层间距为0.32 nm时，由于石墨层间摩擦力的急剧增大，石墨振动振幅迅速减低。当石墨层间距大于0.32 nm时，石墨振荡器的振荡频率随着层间距的增大而减少。研究结果为设计高性能的振荡器提供了一定的理论依据。 The oscillate behavior of graphite oscillators with different interlayer spacing was presented by molecular dynamics simulation method. The interaction force between carbon atoms was modeled by using the Tersoff-Brenner potential coupled with the Lennard-Jones potential. The results show that the effect of interlayer spacing on oscillate behavior of graphite oscillator is very obvious, and with the increase of interlayer spacing, the energy dissipation of graphite oscillator gradually decreases. When the interlayer spacing of graphite is 0.32 nm, the vibration amplitude of graphite oscillator decreases rapidly due to higher interlayer friction. In addition, the oscillation frequency of graphite oscillator decreases with increasing interlayer spacing when the interlayer spacing is bigger than 0.32 nm. The general conclusions derived from this work may provide a guideline for the design of high performance oscillator.
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