Third order wave force on axisymmetric bodies |
| |
Authors: | B Teng S Kato |
| |
Institution: | 1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, People''s Republic of China;2. Ocean Engineering Division, Ship Research Institute, Mitaka 181, Japan;1. LHSV, Ecole des Ponts, CEREMA, EDF R&D, Chatou, France;2. EDF R&D, Laboratoire National d’Hydraulique et Environnement, Chatou, France;3. Aix Marseille Univ., CNRS, Centrale Marseille, Institute de Recherche sur les Phénomènes Hors Equilibre (IRPHE) UMR 7342, Marseille, France;1. Deepwater Technology Research Centre (DTRC), Bureau Veritas 117674, Singapore;2. State Key Laboratory of Ocean Engineering, Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, Shanghai, China |
| |
Abstract: | The third order triple-frequency wave load on fixed axisymmetric bodies by monochromatic waves is considered within the frame of potential theory. Waves are assumed to be weak non-linearity and a perturbation method is used to expand velocity potentials and wave loadings into series according to a wave steepness of kA. Integral equation method is used to compute velocity potentials up to second order in wave steepness. The third order triple-frequency wave loads are computed by an indirect method and an efficient method is applied to form the third order forcing term on the free surface quickly. The method can be used to compute third order triple-frequency surge force, heave force and pitch moment on any revolution bodies with vertical axes. The comparison with Malenica and Molin's results is made on surge force on a uniform cylinder, and comparison with experimental results is made on third order surge force, heave force and pitch moment on a truncated cylinder. More numerical computations are carried out for third order forces and moments on a uniform cylinder, truncated cylinders and a hemisphere. |
| |
Keywords: | Wave forces Third order Wave diffraction Axisymmetric body |
本文献已被 ScienceDirect 等数据库收录! |
|