Bulletin of the Society of Naval Architects of Korea (대한조선학회지)
- Volume 19 Issue 4
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- Pages.53-59
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- 1982
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- 1225-1178(pISSN)
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- 2765-2858(eISSN)
Analysis of Relative Bow Displacements of a Ship in Regula Waves
선박(船舶)의 규칙파중(規則波中)에서의 상대선수변위(相對船首變位)의 해석(解析)
Abstract
Relative bow-motions of a ship in wave are investigated by using linear theory. The relative displacement is assumed to be composed of incident wave elevation, motion response, dynamic swell-up and ship wave elevation. Radiation problem is solved by distributing sources on the hull surface and wave elevation in a uniform stream is obtained by integrating Havelock's function with centerplane source distributions. Relative displacements for I.T.T.C. S7-175 model are calculated. Dynamic swell-ups make the relative displacement larger except small heading angles. Amplitudes of relative motion on weather-side are generally larger than those on lee-side. Ship wave elevations in a uniform stream also give considerable contributions and our calculations are verified to be reasonable in comparison with experimental results.
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