DEVELOPMENT OF A PARTIALLY THREE-DIMENSIONAL MODEL FOR SHIP MOTION IN A HARBOR WITH ARBITRARY BATHYMETRY

Proceedings of the International Conference on Coastal Engineering

Mitsuru Tsuchida²  Takumi Ohyama¹ 

[1] Centre for Water Research, The University of Western Australia;Institute of Technology, Shimizu Corporation

关键词: 3D bathymetry;    3D model;    ship motion;   

DOI  :  10.9753/icce.v24.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

A numerical method has been developed for the analysis of ship motions in a harbor with arbitrary bathymetry. A BEM-based 3-D model, applied partially to a near-field surrounding a ship, is combined with a FEM-based 2-D model, utilized in the remainder of harbor domain. This combination may achieve an efficient computation of the ship motions with taking into account of wave deformation in a harbor. Preliminary examinations have been performed to investigate appropriate location of a matching boundary where these two models are coupled. It is found that, for reliable prediction, (2 ~ 3)ft (h: water depth) is required for the distance between the matching boundary and a body. The numerical results of added mass and damping coefficients for a rectangular floating body in a rectangular basin are then compared with those obtained from a conventional numerical model. Favorable agreement between the results verifies the present numerical method. Ship motions in a harbor with slowly varying depth are also demonstrated.

【 授权许可】

Unknown