| The artificial island foundation is made up of six large diameter cylinders connecting with skirt boards. Aerate at the bottom, and the air supported foundation can be towed on the sea. The towage resistance, static stability and motion response of artificial island foundation in different wave are studied in this paper.Considering different draft, wave parameters and towing speed, reasonable model is designed and available scheme is formed. towage resistance and motion response of model is measured. According to similarity criterion, towage resistance and motion response of prototype is obtained. The model period of motion is measured by freedamping test. On the basis of attenuation curve, damping is got.The floating condition of the foundation in different draft is considered and air pressure, liquid surface height difference, air column height and liquid column height are calculated. Force analysis is made when the single-cylinder and multi-cylinder foundation are in heeling condition. The concept of air buoyancy reduction coefficient is introduced. The metacentric height and angle of inclination made by wind heeling moment are calculated. Based on the afloat condition, bottom outlet angle and critical flat angle are calculated in different draft.The diffraction velocity potential is solved by wave potential theory and the boundary progressive matching method. Through programming, loads and motion response of the artificial island foundation are calculated.By means of model test and computational analysis, the property of resistance and motion of artificial island foundation during floating towing is predicted. The suitable environment for towing is given and the feasible analysis method for floating towing is presented. This paper provides a practical analysis method for similar structure of air supported during towing. |
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