Parametric Modeling And Flow Field Analysis Of Cutter Head Of Cutter Suction Dredger

The dredging project playes a vital role in the construction of deep-water ports,the control of polluted waters,the widening of existing waterways,and the reclamation of islands.The cutter suction dredger is the main ship type in dredging projects,during its construction period.The cutter head continuously cuts the soil layer and pumps the media from suction port into slurry pipe.As the core equipment of the cutter suction dredger,the cutter head has an important influence on the working efficiency of the cutter suction dredger.How to effectively optimize the mechanical properties of the cutter head and improve the dredging production has always been a research hotspot.Base on the secondary development method of three-dimensional modeling software and computational fluid dynamics method,this paper develops the parametric modeling software of cutter head and studies the influence of key size of cutter head on flow field characteristics and dredging production of,which provides reference data for dredger construction.The main research contents of this paper are as follows:(1)According to the spatial structure characteristics of the cutter head,the contour equation of the cutter arm is constructed,the 3D model of the cutter head is drawn in SolidWorks,the basic flow of the cutter head modeling is determined,and the CFD model of flow field analysis is established based on the working principle of the cutter head.(2)According to the modeling process of the cutter head,the key dimension parameters of cutter head are integrated,the object level of the secondary development of SolidWorks and the interface function required for the cutter head modeling are analyzed,and the secondary development is carried out,the parametric modeling code of large ring,hub and arm of the cutter head is written,then get three shapes of cutter head.(3)Divide the rotating and stationary domain of cutter head,set the corresponding soil parameters and construction parameters in fluent to make the cutter head work at fixed speed.Analyse the distribution and variation of suction concentration,the variation of velocity field of cutter head,surrounding sediment distribution and cutter arm pressure of three shapes of cutter head under different inclination angle.Then explore the best shape of cutter head and the most suitable inclination angle under the soil parameters set in this paper.(4)Combining with the results of flow field analysis,the cutter arm shape is further optimized,and the cutter arm pressure after optimization is analyzed to verify the rationality of the optimization method,and to explore the optimal combination strategy of size parameters in cutter design.