水道港口2025，Vol.46Issue(6)：861-867,895,8.
不同床面布置型式推移质颗粒运动特性试验研究
Experimental study on transport characteristics of bedload particles under different bed configurations
摘要
Abstract
The velocity of bedload particles is one of the fundamental parameters in studying bedload transport processes.It is influenced by various factors such as flow intensity,bed structure,and sediment supply,and it significantly affects sediment transport rates and riverbed evolution.Based on simplified experiments on bedload particle motion over two bed configurations under conditions of equivalent roughness height,the time-averaged characteristics and probability density distributions of particle velocity were analyzed.The experimental results show that,under flow conditions sufficient to maintain continuous particle motion,particles on the rectangular packed bed predominantly move longitudinally,exhibiting a periodic pattern of"acceleration-deceleration-acceleration".On the plum blossom packed bed,lateral oscillation amplitude and frequency increase significantly,while other motion characteristics remain similar to those on the rectangular bed.The probability density distribution of longitudinal velocity follows a Gamma distribution,while that of lateral velocity follows a normal distribution.The lateral velocity distribution on the plum blossom bed is more dispersed,indicating that under equivalent roughness height conditions,different bed configurations exert a certain influence on the magnitude of particle velocity,but the statistical characteristics of particle velocity tend to be consistent.关键词
推移质运动/床面型式/概率密度/水流强度/粗糙度/流速Key words
bedload movement/bed form/probability density/water flow intensity/roughness/flow velocity分类
交通工程引用本文复制引用
吴建民,肖毅,邓敬宏..不同床面布置型式推移质颗粒运动特性试验研究[J].水道港口,2025,46(6):861-867,895,8.基金项目
国家重点研发计划资助项目(2023YFB2604700) （2023YFB2604700）
