| Nowadays,energy which includes coal,oil,and natural gas are the foundation of modern industries,but with the rapid development of industry,the total reserves of these fossil fuels are increasingly scarce.Undoubtedly the incontinent burning of these fossil fuels lead to a large number of negative effects.In order to solve these problems,people try to find a variety of clean energy to instead the use of traditional fossil fuels,these clean energy sources include wind energy,solar energy,ocean energy(wave energy,ocean current energy,tidal energy,temperature difference energy,salt tolerance energy,etc.)and the geothermal energy.The effective utilization and development of ocean energy are focused by the whole world,beside some near-shore equipment.are required to have a suitable anchor facility to withstand the threat from the natural environment.As a form of ocean generator,ocean current energy generator can't be developed easily because of the difficulty of developing deep water mooring structures,as well as the relatively slow speed.In this paper,a new structure has been proposed,which can be used as a mooring structure for the ocean current energy generator.A single generator is moored at a grid section of the structure.Using a modular approach to accomplish the arraying of the generator model which facilitating the laying of the generator in the deep water.Taking Taiwan Province as an example,it possesses the abundant potential energy,especially in its northeast area where the Kuroshio contains the most significant energy.So the observed hydrological parameters in PCM-1 cross section should be referenced.The contents of this dissertation are mainly consisted of the following parts:The advantages and disadvantages between the flexible boundary grid structure(that is,the grid structure is composed of the flexible part except the grid nodes)and the traditional composite cable mooring device have been verified,which cannot be neglected.The dynamic response of the flexible boundary mesh system and the rigid boundary grid system under the same environmental load was compared.The third part includes the following two aspects: one is that the dynamic response of the catenary mooring and the tension leg mooring is used to analyze the rigid boundary grid in the form of mooring in the depth of 450 m to know which is more suitable for the mooring system;the other is the comparison of the dynamic response of the rigid boundary grid structure in 1300 m and 450 m water depth when it is catenary mooring.In general,the paper verifies that the performance of flexible boundary grids in dynamic response is better than the general composite cable systems under specific water conditions,while rigid boundary grid fusing equipment can solve the problem that the flexible boundary equipment is difficult to overcome in many aspects.It can be found from the third part that for Ge5,2 generator under three different conditions,the motion of rigid boundary center is larger when it is catenary mooring in the depth of 400 m,whose G-Y direction motion is the biggest;under the condition of the motion in G-X direction of the center point of the boundary rigid in the depth of 1300 m is the biggest when it is catenary mooring mode.The maximum for the tension leg type rigid equipment 400 m water depth conditions,the range of motion is between the above two forms.For the stability of power generation,from high to low order,the sort is rigid catenary mooring equipment 1300 m depth boundary conditions,rigid boundary equipment tension leg form 400 m depth under the condition of rigid boundary equipment form 400 m catenary water depth conditions;thus,it can be shown that the stability of generator power depends on the amplitude of the square grid,that is to say,for the mooring system,the current generator of mooring equipment,its positioning ability is no longer the most important part,how to ensure the blade relative flow velocity and flow direction has become a consistent focus on the need to consider for the mooring equipment. |
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