| In this thesis，the buoy system and pendulum system of the collection device are simulatedand optimized, building a simulator of the power generation system and land-basedsemi-physical method simulation are experimented based on the floating and pendular type waveenergy converter that proposed by author’s research team, details of content as follows.(1) Some of the theories and modules in the AQWA hydrodynamic calculation software areintroduced, including microwave theory, the Green function method, the fluid force formula, eq-uation of time-domain and frequency-domain. The AQWA-LINE、AQWA-LIBRIUM andAQWA-NAUT are described, including their functions, features and range of applications.(2)The pendulum and buoy system of the floating and pendular type wave energy converterare simulated based on the AQWA software. And its process is to simulate and compute the re-sponse of the pendulum and buoy under different sea conditions, to obtain the pendulum angle,RAO value, anchor chain tension value, hydrodynamic parameters and heave amplitude underthe different wave period, wave height and wave direction. The relevant conclusions are as fol-lowed：①The pendulum system are in a better operating status when the wave direction is45.②The greater the wave period, the wider the width of the waveform diagram, the slower the re-sponse of the pendulum and the buoy. The higher the wave height, the larger the angles range ofthe pendulum and the heave amplitude of the buoy.③The amplitude of the buoy is greater thanthe float box.④The wave frequency has a smaller impact on the added mass while has a greaterimpact on the radiation damping, the added mass and radiation damping increases as the drai-nage volume increases.⑤The fatigue fracture of the anchor chain should be noted when waveperiod is more smaller.(3) The four different shapes’ pendulums have been optimized using AQWA software. Thependulum swing angle, hydrodynamic parameters and level exciting force of the rectangularbody, inverted cone, cone, and serrated body was calculated. The best shape of the pendulum, thebest draft depth, the best load and the best distance between the pendulum and the wall are opti-mized. The relevant conclusions are as followed:①the pendulum swing angle, radiation damp-ing and exciting force of the cone are larger, but the pendulum which have a smaller radiationdamping, larger exciting force and swing angle is the ideal shape.②The greater the drainagevolume, the greater the radiation damping. The radiation damping and the horizontal diffraction force are very sensitive to wave frequency’s change. With the increase of the wave frequency, thetwo values are also increased.③Compared to the other three shape, the cone is more suitable fora higher level sea conditions. For the cone discussed in this thesis, the better draft depth shouldbe less than0.6m, the better load of the pendulum shaft should be less than300N m, the betterdistance between pendulum and wall is4m.（4）Building a laboratory experiment platform. To achieve the vertical movement of thehydraulic cylinder through controlling the inverter signal simulating wave. The6kinds of pro-grams are set in the experiments, to obtain the total input power, output power, output currentand output voltage. The relevant conclusions are as followed:①The power generation efficiencydecreases as the input frequency increases.②The input powers can be obtained very good over-lay when the hydraulic pusher approximation’s input powers are different.③The balance opera-tional efficiency is significantly higher than the imbalance operational efficiency.④The stokehas impact on the total input power and the generator output power. |
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