Gravity Deep-water Submersible Net Force Characteristics

Nowadays the development of abyssal aquaculture cages is playing an increasingly important role in the sea farming industry in China But meanwhile, there are still some problems arising The sea farming industry in China focus on shoals and bays with good protection in which the water depth is small while the aquaculture density is large. These factors in addition to the pollution problems in the coastal gone have descended the quality of fishes, thus have had some negative effects on the economic benefits. Therefore, to enlarge the aquaculture areas and exploit the deep sea is the way we must follow .And the key is the development of abyssal aquaculture cages ,to be exact, the storm proof ability of the cages. On the basis of many related data from abroad, this thesis is an attempt to simulate the hydrodynamic characters of abyssal gravity cages under the action of currents and waves. The main achievements of the thesis include :1 The model design of abyssal aquaculture cages;2 The hydrodynamic characters of the cages under the action of pure current in the states of floating Vs submerging;3 The hydrodynamic characters of the cages under the action of pure wave in the states of floating Vs submerging;4 The hydrodynamic characters of the cages under the joint action of currents and waves in the states of floating Vs submerging;5 The effects of currents and waves on the exciting forces and motion of the gravity cages. Based on the results above the author summarizes some points about abyssal gravity cages...