摘要
在讨论床面均匀沙颗粒起动标准的基础上,引入休止角的表达式和随机性理论推导出不同底坡下均匀沙起动概率,进而导出泥沙起动流速。通过已有的研究成果验证本公式的合理性。结果表明:本公式适用于大比降河道,而且对普通河道的适用性也较强。分析了典型无黏性均匀沙起动公式差异性的原因。
Based on the standard of incipient motion of uniform sediment,the incipient probability was deduced by the concept of sediment angle of repose and the random theory,and the incipient velocity of uniform on different bed slopes was obtained. Through the comparison with the former research,the result showed that this formula can be used not only in large gradient channels,but also in the common chnnels.
出处
《四川大学学报（工程科学版）》
CSCD
北大核心
2013年第S2期32-35,共4页
Journal of Sichuan University (Engineering Science Edition)
基金
国家"973"计划资助项目(2011CB409903)
国家自然科学基金资助项目(51279116)
关键词
大比降
均匀沙
起动概率
起动流速
large gradient
uniform sediment
incipient probalility
incipient velocity
