以公切角表征床-沙位置关系的非均匀沙起动风速
hreshold wind velocity to non-uniform sand which position relation of bed-sand expressed by the commom tangential angle
本文引入起动沙粒与上下风向沙粒的内公切线与水平面的交角为参数，把荫暴作用以起动沙粒与上下风向沙粒的内公切线与水平面的交角表示出来，并通过一系列公式推导确定起动沙粒的粒径与自由风速之间的关系。并根据实验数据得到公式中的回归系数，从而运用公式计算出各个粒级所对应的起动风速，并将其与实验结果进行了相关性计算得出0.9411的相关系数，证明了本文模型是合理的。
he common tangential angle of starting sand, whose common tangential line passes through the tangential point of the sand particles, is indicated the position of the particles in this paper. Based on the expression of wind speed and position of the particles, expression of threshold wind velocity to non-uniform sand is formulated. the coefficients in the formula are determined by experimental data. The correlative coefficient between the calculated and the experimental data is 0.9411, which suggests that the calculation model in this paper is resonable.
李晖、潘喜英、黄宁
大气科学（气象学）水利工程基础科学
公切角起动风速非均匀沙荫暴作用
common tangential anglehiding-exposing actionthreshold wind velocitynon-uniform sand
李晖,潘喜英,黄宁.以公切角表征床-沙位置关系的非均匀沙起动风速[EB/OL].(2009-05-12)[2025-08-06].http://www.paper.edu.cn/releasepaper/content/200905-278.点此复制
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