Numerical Simulation Of Combined Actions Of Wind, Wave And Current And Their Actions On Cylindrical Component

In the marine structure engineering, mainly use the physical simulation andnumerical simulation methods to simulate the Marine environment load of wind, waveand current. For physical simulation, setting up a combined simulation ofwind-wave-current is hard, only few laboratories can realize the work. It is an effectivemethod to use high-precision numerical tank to research the response of marinestructure under the combined load of wind-wave-current, it is also a frontier research inrecent years. It has important reference value for the sea engineering structure designand safety evaluation.Thesis established a2-d and3-d state of the numerical wave tank, it based on theFluent software, borderline methods of wave generating, damping wave eliminationtechnique, VOF method of free surface’s treatment and user design function. Finishedthe numerical simulation of second order Stokes the wave, numerical wave have a goodrepeatability and stability in propagation process, numerical wave coincided with thewave of theory.Based on the simulation of wave, Thesis Created the simulate method about thecombined simulation of the wind-wave-current. Based on the simulation method ofwave-current, Thesis finished the analysis of the interaction between wave and current,when the current and wave have the same direction, the wave move faster, the waveheight smaller. Based on the generation of the wind with uniform velocity up the freewater surface, Thesis also realized the numerical tank to simulate the joint of wind-waveand wind-wave-current.Based on the three dimensional numerical tank for combined wind-wave-current,done the analysis of the response about the typical cylindrical component under the loadof wind, wave, current and their combined actions. As a whole, the responses of jointloads greater than the individual responses’ linear superposition.