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非均匀沙运动规律与均匀沙明显不同。本文从非均匀沙起动的特点出发 ,阐述了其运动机理 ,采用滚动起动模式。通过对附加质量力的概念及表达式和相对暴露度参数的引入 ,推出了非均匀沙起动公式。并用实测资料进行了验证 ,同其它学者们的公式相比较为合理。同时得到了均匀沙的起动公式 ,其系数涵盖了其它均匀沙公式。说明本文公式较好的反映了非均匀沙的起动特性。
The law of non-uniform sand movement is obviously different from that of uniform sand. Starting from the characteristics of non-uniform sand starting, this paper expounds its movement mechanism and adopts rolling starting mode. By introducing the concept of additive mass force and the introduction of parameters of relative exposure, a non-uniform sand starting formula is introduced. And verified with the measured data, compared with other scholars formula is more reasonable. At the same time, the starting formula of uniform sand is obtained, whose coefficients cover other uniform sand formulas. It shows that the formula in this paper better reflects the starting characteristics of non-uniform sand.