| dc.contributor.author | Mousavizadegan, Seyed Hossein. | en_US |
| dc.date.accessioned | 2014-10-21T12:35:38Z | |
| dc.date.available | 2005 | |
| dc.date.issued | 2005 | en_US |
| dc.identifier.other | AAINR13052 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10222/54766 | |
| dc.description | This dissertation is organized in two parts. Part one presents the derivation of an analytical benchmark solution to the second-order steady force acting on a submerged sphere in a fluid of infinite depth and the development of a higher-order boundary integral equation method for solving motions of bodies in time-harmonic waves. Part two deals with an analytical solution to the second-order forces acting upon a fixed circular cylinder in monochromatic waves in the finite and infinite fluid depth. | en_US |
| dc.description | In part one, the analytical solution for a submerged sphere is obtained by using the multipole expansion method and expanding the velocity potentials into a series of associated Legendre functions. The horizontal drift force is computed taking into account the effect of the radiation velocity potential using the far field method. The contribution of components of the radiation velocity potential on the total horizontal drift force is studied along with the effect of the position of the center of mass. | en_US |
| dc.description | A higher-order panel method in the wave-body interactions is developed for solving the first-order potentials and the associated problems. The direct boundary integral formulation is applied and the kernels of the integrals are regularized using the adding and subtracting technique. The modified integral equations are nonsingular and amenable to solution directly by the Gaussian quadrature formula. In order to compute the velocity potentials, the collocation method is applied to generate systems of algebraic equations. All types of parametric expressions of the body surface can be used for solving the associated integral equations. The application of the method to different structures indicates that the method is accurate, simple to implement and efficient in time and memory. | en_US |
| dc.description | In part two, an analytical solution to the second-order wave loads is obtained for the diffraction of monochromatic waves by a surface piercing vertical cylinder in finite and infinite fluid depth. The Weber transform is applied to compute the second-order force due to the second-order velocity potential. Different contours are applied to derive the analytical solution for the involved improper integrals. This makes the present solution distinct from the other available solutions for the second-order forces on bottom-mounted circular cylinder. | en_US |
| dc.description | Thesis (Ph.D.)--Dalhousie University (Canada), 2005. | en_US |
| dc.language | eng | en_US |
| dc.publisher | Dalhousie University | en_US |
| dc.publisher | | en_US |
| dc.subject | Engineering, Mechanical. | en_US |
| dc.title | Analytical and numerical approaches to determine the second-order forces in wave-body interactions. | en_US |
| dc.type | text | en_US |
| dc.contributor.degree | Ph.D. | en_US |
