Vertical cambered V-type otter boards are widely used in large and medium-sized trawlers for their good stability and adaptability to various water layers.However,limited numerical studies on the hydrodynamic performa...Vertical cambered V-type otter boards are widely used in large and medium-sized trawlers for their good stability and adaptability to various water layers.However,limited numerical studies on the hydrodynamic performance and structural strength of this type of otter board have been published.In this study,we established the three-dimensional numerical model of the double-slotted vertical cambered V-type otter board according to its special structure and stress feature.We compare the hydrodynamic performance results of our model with those of previous experiments.Using this model,we analyzed the influence of parameters such as attack angle,aspect ratio,dihedral,and deflector angles on its hydrodynamic performance.Moreover,the structural response characteristics of the otter board under typical working conditions were studied.We believe our results will provide theoretical reference for the structural design and optimization of the vertical cambered V-type otter board.展开更多
As the key structure of buoyancy and dynamic lift generation,the float is one of the most important attachments of the fishing gear in ocean fishery.For the special work environment,the float may deform and move under...As the key structure of buoyancy and dynamic lift generation,the float is one of the most important attachments of the fishing gear in ocean fishery.For the special work environment,the float may deform and move under the hydrodynamic force when it works.At the same time,the motion may cause the impacting action from fluid and structures around.Then the investigation of the mechanical behavior of the float is of important significance for the structural design and performance optimization of the fishing gear,and even for the development of the ocean fishery.The three-dimensional numerical model of marine float working in the flow field was established based on the Computational Fluid Dynamics(CFD)method and the finite element(FEM)method according to the structural form and the mechanical characteristics in operation.The hydrodynamic performance and impact resistance were analyzed,and the response mechanism of float structure under the action of hydrodynamic load and impact load was summarized.It aims at providing basic theory support for the structure design and optimization of marine float and the related fishing gear.展开更多
基金This research was supported by the National Natural Science Foundation of China(31972845)the Open Fund of National Engineering Research Center for Oceanic Fisheries(A1-2801-18-100401-7).
文摘Vertical cambered V-type otter boards are widely used in large and medium-sized trawlers for their good stability and adaptability to various water layers.However,limited numerical studies on the hydrodynamic performance and structural strength of this type of otter board have been published.In this study,we established the three-dimensional numerical model of the double-slotted vertical cambered V-type otter board according to its special structure and stress feature.We compare the hydrodynamic performance results of our model with those of previous experiments.Using this model,we analyzed the influence of parameters such as attack angle,aspect ratio,dihedral,and deflector angles on its hydrodynamic performance.Moreover,the structural response characteristics of the otter board under typical working conditions were studied.We believe our results will provide theoretical reference for the structural design and optimization of the vertical cambered V-type otter board.
基金supported by the National Natural Science Foundation of China(Grant No.31972845,Grant No.11402143).
文摘As the key structure of buoyancy and dynamic lift generation,the float is one of the most important attachments of the fishing gear in ocean fishery.For the special work environment,the float may deform and move under the hydrodynamic force when it works.At the same time,the motion may cause the impacting action from fluid and structures around.Then the investigation of the mechanical behavior of the float is of important significance for the structural design and performance optimization of the fishing gear,and even for the development of the ocean fishery.The three-dimensional numerical model of marine float working in the flow field was established based on the Computational Fluid Dynamics(CFD)method and the finite element(FEM)method according to the structural form and the mechanical characteristics in operation.The hydrodynamic performance and impact resistance were analyzed,and the response mechanism of float structure under the action of hydrodynamic load and impact load was summarized.It aims at providing basic theory support for the structure design and optimization of marine float and the related fishing gear.
