Numerical simulation of flow structure and dynamic characteristics of sinking flexible mattress
Inspired by the tearing and splitting of flexible mattresses during sinking construction,the k-ω SST tur-bulence model and partitioned coupling method were used to simulate the downstream sinking process in two-way coupling.The flow field around the flow,vortex structure,and dynamic response of the mattress were analyzed un-der different flow conditions,and the calculation accuracy of the model was validated through flume experiments.Results revealed that after the water flowed through the mattress,the flow separation occurred,resulting in a sym-metrical reflux zone along the central axis of the row width.The upstream surface velocity of the mattress increased exponentially with increasing water depth,and the maximum velocity in the high-speed wake zone behind the mat-tress was 40％～50％higher than the average velocity.As the Reynolds number increased,the main vortex struc-ture gradually developed from the side near the bed surface to the water surface.Moreover,stress on the mattress was distributed transversely as a strip,with peak stress concentration observed near the junction between the mat-tress,rotating plate,and head beam.This study provides theoretical guidance to improve the structural design of the mattress and techniques for sinking construction.
国家科技期刊平台
NSTL
万方数据
维普
