中文摘要：

在一个二维的 Yukawa 费用灰尘系统的纵、横向的格子波浪的分散性质上的粒子数字密度的效果用分子的动力学模拟被调查。为波浪的分散关系被获得。纵、横向的灰尘挥动的两个的频率与密度增加，这被发现，当密度足够地高时，一个截止区域出现在短波长。随粒子数字密度的增加，普通频率趋于增加，并且纵的波浪的健全速度也增加，但是横向的波浪的仍然保持低。

英文摘要：

Effect of the particle number density on the dispersion properties of longitudinal and transverse lattice waves in a two-dimensional Yukawa charged-dust system is investigated using molecular dynamics simulation. The dispersion relations for the waves are obtained. It is found that the frequencies of both the longitudinal and transverse dust waves increase with the density and when the density is sufficiently high a cutoff region appears at the short wavelength. With the increase of the particle number density, the common frequency tends to increase, and the sound speed of the longitudinal wave also increases, but that of the transverse wave remains low.