研究自然界中沙粒运动的微观状态,是防沙害工程中的一项基础课题。本文报告了把高速频闪光摄影应用到野外风沙流条件下,首次进行的野外沙粒运动动态摄影实验。 文中介绍了我们为适应野外条件而设计的专用实验装置及其实验方法。从工程研究的角度出发,用统计方法,对挑选出的172颗轨迹较为清晰完整的沙粒进行分析;并将 Studying the microcosmic state of grit in nature is a basic subject in the project of sand prevention. This paper reports the first dynamic field experiment of sand movement in the field under the condition of wind-blown sand flow in high-speed flash photography. The paper introduces our special experimental device designed to adapt to the field conditions and its experimental method. From the perspective of engineering research, the statistical analysis of the 172 sand particles with clear and complete trajectory was carried out.