Numerical Analysis Of Coupled System In The Three Gorge Ship-Lift

Firstly, in this thesis a simplified ship-water-chamber model is made by the load feature in the Three Gorge project. The non-linear water-wave equation in the fluid and the motion equation in the rigid structure are derived separately for the model. After the non-linear water-wave equation is divided into the first order and second order equation by the perturbation theory, the corresponding finite element matrix equations have been derived by means of Galerkin method. Furthermore, the general stiffness matrix is formed and the finite element matrix equations about the general displacement of the rigid structure are derived. The whole coupled equation is gotten by combining those equations in the fluid and the rigid structure. On the basis of the above work, the analysis in the time domain and frequency domain is completed.Secondly, a simplified ship lift model is founded including the balance weight subsystem, the lift subsystem and the ship-chamber subsystem. The controlling equation of the model is derived and symmetrized. So the study of the eigenvalue and the stabilization can be advanced expediently. Therefore, we can get the frequency of the model and the stabilization conditions.Lastly, much numerical calculation of the above work is done and some interesting results are given.