泥沙颗粒形状对非均匀沙起动条件的影响
Effect of grain shape on incipient motion of non-uniform sediment
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摘要: 根据非均匀沙颗粒的不均匀性,引入颗粒形状系数,通过分析泥沙颗粒形状系数和相对暴露度的影响,建立了等效粒径表达式;并通过泥沙起动受力分析,推导得到泥沙起动临界条件表达式.实测资料验证表明,计算值与实测值符合较好.Abstract: Based on non-uniformity,the grain shape coefficient is introduced.By analyzing influence of shape coefficient and exposure degree,the formulas for calculating equivalent grain and the incipient motion condition of non-uniform sediment are established by the relative exposure degree and shape coefficient.Verified by using the experiment data,the result shows that the experiment data are adjacent to the measured value.