Hydrodynamic Analysis Of New Energy Platform With Mooing System

In resent years, the development and utilization of marine renewable energy such as wave energy, tidal energy, offshore wind energy and solar energy has become the focus of research home and abroad, due to its incomparable advantages of clean, non-polluting and renewable. Among them, the offshore solar energy contains highest technical content and broadest application prospect due to its terrestrial solar mature technology. As the contention for resource becomes increasingly intensive, the detection of the marine environment data and the offshore surveillance and communication arise at the historic moment. On the basis of full investigation of the development situation of all kinds of marine structures and the correlative hydrodynamic theory research, this thesis designs the structural types and analyzes the hydrodynamic performance of the renewable energy platform which has beter kinematic performance. The main research contents are as follows:According to the design process of the floating platform and the working characteristics of the solar equipments, the structural design is performed to analyze the hydrodynamic performance of the cone structure form and frustum cone structure form. The hydrodynamic calculation model is built by the combination of the 3-D potential flow theory and Morison theory. For the selection of the frustum cone structure form with better hydrodynamic performance by comparing the frequency-domain motion response operator RAO, The frequency-domain calculation is performed by the hydrodynamic software AQWA. Installed the motion sensors and wireless transmission in the platform model to measure and collect test datas, which provides a simple but practical method for the experimental measurement and data acquisition of model experiments on ocean engineering. In order to prove the validity of the calculation method which is combined with 3-D potencial theory and Morison theory, the time-domain regular wave calculation results were compared with experimental results.In the view of the real sea state of the South China Sea, time-domain irregular wave numerical simulation is performed. The existence of the mooring cable can make heave down significantly on complete mooring condition, but do not make heave rise due to cable weight loss on damage mooring condition. Under the normal operation sea condition, the shaking movement can satisfy the work requirement of the platform both on complete and damage mooring condition. Operation depth has no effect on platform’s shaking movement, but when the wave spectrum peak parameters growns, the platform’s heave and shake will be more severe. What’s more, the platform’s gravity center does not affect the heave performance, but the platform’s shaking movement will be better when the gravity center down.