Research On The Mooring System Of Buoy-Rope-Drum Wave Power

In recent years,energy crisis and environmental pollution is threatening human people with the depletion of fossil energy.Each country has put the development and utilization of the new engery in the primary position.As a new type of renewable resources,jtheoretical analysis shows.That wave energy has the advantages of high energy density,wide distribution,cleanliness and no polution.The Buoy-rope-drum wave power technology is a new kind of power generation,also it has many features,such as small volume,low cost, simple construction,easy-maintenance,high power efficiency and so on.The thesis topic is based on the project of Buoy-rope-drum wave power t-echnology research and experiment which is funded by the National Renewable Energy Special Fund. This paper mainly researched on the mooring system of Buoy-rope-drum wave power generation device through the theory analysis,preli-minary design, software simulation technology based on AQWA, sea trial.The research content is as follows:1. It gave brief introduction for the principle of Buoy-rope-drum wave power device.After referred to many related literatures,objective to understand the related research of mooring system of wave power energy device at home and abroad. And we choose catenary mooring system as our final project based on the principle of power generation by a detailed analysis.2.1t put forward a conclusion that the catenary mooring system has no effect on the efficiency of the power generation by theoretical calculations and simulation. Finally, we verify the feasibility of the catenary mooring system.3. It gave method for calculating the first-order wave force,wind and current load.It also analysed the second-order wave force by AQWA.It provide basic date for the mooring system in the next step.4. It gave the preliminary design of the mooring scheme.Firstly,according to analys the catenary equation,it campared the different between anchor chain,wire rope and combined mooring system. We selected anchor chain as our mooring line according to the analysis results. Then,selected the specification parameters of anchor chain according to the wave force,wind and current load.Secondly,designed the layout scheme of mooring system including the number of anchor chain and the angle between anchor chain and wave.We found that sometimes it couldn’t raise the wave resistance of the catenary mooring system by increase the number of chain.It also can raise the wave resistance through the reasonable layout angle between anchor chain and wave.Thirdly,designed the anchor according to the tension amplitude.Finally, through the ocean experiment to verify the feasibility of catenary mooring system on Buoy-rope-drum wave power generation device.5. It has solved the safety of the mooring system in Extreme Sea Environment. Firstly,the ascent-descent buoy was put forward to solve the safty problem. Secondly,we proposed and compared two scheme based on different principle, then selected the best suitable for our buoy. Finally, through the Model Test to verify the feasibility of ascent-descent buoy in Extreme Sea Environment.