수직 평판 요소의 수중동요 근사해와 설계 적용

• Published in: 大韓造船學會 論文集 Vol. 55; no. 6; pp. 527 - 534
• Main Authors: 오정근(Jungkeun Oh), 김주열(Ju-Yeol Kim), 김효철(Hyochul Kim), 권종오(Jongho Kwon), 류재문(Jae-Moon Lew)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2018
• Subjects: 조선공학; linear superposition(선형 중첩); wave generator design(조파기 설계); wave board motion(조파판 운동); Submerged segment(수중 요소); approximate solution(근사해)
• ISSN: 1225-1143; 2287-7355
• DOI: 10.3744/SNAK.2018.55.6.527

The segment of the piston type wave board has been expressed as a submerged vertical line segment in the two dimensional wave flume. Either end of vertical line segment representing wave board could be located in fluid domain from free surface to the bottom of the flume. Naturally the segment could be extended from the bottom to the free surface of the flume. It is assumed that the piston motion of the wave board could be defined by the sinusoidal oscillation in horizontal direction. Simplified analytic solution of the submerged segment of wave board has been derived through the first order perturbation method in water of finite depth. The analytic solution has been utilized in expressing the wave generated by the piston type wave board installed on the upper or lower half of the flume. The wave form derived by the analytic solution have been compared with the wave profile obtained through the CFD calculation for the either of the above cases. It is appeared that the wave length and the wave height are coincided each other between analytic solution and CFD calculation. However the wave form obtained by CFD calculations are more closer to real wave form than those from analytic calculation. It is appeared that the linear solutions could be not only superposed by segment but also integrated by finite elements without limitation. Finally it is proven that the wave generated by the oscillation of flap type wave board could be derived by integrating the wave generated by the sinusoidal motion of the finite segment of the piston type wave board.