Analysis And Experimental Study Of Wave-current Loads On Jack-up Truss-type Leg

Firstly, the calculation Principle and analysis method of wave and current forces on small bodies are summarized in this thesis. The solving methods and influencing factors of the drag coefficient C_d and the inertia coefficient C_m are discussed. And in view of how to apply the Morrison equation to solve for wave and current loads on truss legs of jack-up platform, based on prototype of K-type truss leg of 90m water depth jack-up platform, Designed and carried out model tests of local truss leg and cylindrical chord. It is the first time in our country to study the wave and current loads by taking the local model of truss leg as the research object.By using ANSYS finite element software as a complementary tools, at an early stage, designed the model test and analysis the feasibility of experiment. And late in the experiment, collected and C_alculated experimental data, then obtained the value range of drag coefficient C_d and inertia coefficient C_m.Draw the curve charts with the R_eynolds number R_e or Kc. Found the law, and the recommended values. The results provide reference for the selection of the value of hydrodynamic coefficient for the future. At the same time, the experimental Scheme and method provide some significance for reference and direction of analysis on designing the wave and current loads test of truss leg.