| Summary: | 碩士 === 淡江大學 === 機械工程學系 === 88 === The numerical model stated in this work takes the DELTA method (The Desingularized Eulerian-Lagrangian Time-domain Approach method) as its theoretical basis. Desingualrization means to move the singularities that traditionally located right on the boundaries of the computational domain out of the domain, hence, the special treatment for the singularities is avoided. In addition, a mixed Eulerian-Lagrangian description technique is adopted to solve the problem of wave overturn.
The boundary conditions applied in the time domain numerical model built in this thesis are fully nonlinear combined free surface boundary condition and exact body boundary condition. The variations of free surface are simulated when different types of non- wall-sided floating bodies are moving with forced oscillating motions. The numerical results for the motions of a 3-D wall-sided floating body agree well with experimental data. A series of non-wall-sided floating bodies under different modes of motions and different water depths are conducted, and then the application range of the DELTA method in handling arbitrary shapes of floating bodies is tested. The numerical results obtained using the DELTA method are presented and discussed in this paper.
|
|---|
