关键词: 颗粒运动, 动态摄影, 滑移, 模拟轨迹

Abstract: On the basis of a great number of field measurements and dynamical photographies of moving sand (snow) particles, this paper described the major motion patterns of various kinds of solid particles transported by air current over ground surface images of vibration, rolling slippage, saltation and suspension. Through mechanical analysis, an expression of major motion parameters was given and established simple mathematical models respectively. In addition, a simulated orbit equation for saltation was derived. As compared with the actually photographied orbit the model is better than the saltation orbit simulated by former researchers. This paper first used the slippage movement concept, namely the particle movement patterns of vibration, rolling and slippage to replace the traditional classification:creep, saltation and suspension. Finally, the paper answered how the first particle begins to bound.