에너지 소산 모델을 이용한 잠수된 가동식 방파제의 유체동역학적 성능 수치해석

• Published in: 大韓造船學會 論文集 Vol. 49; no. 4; pp. 287 - 295
• Main Authors: 김도현(Do-Hyun Kim), 구원철(Weon-Cheol Koo)
• Format: Journal Article
• Language: Korean
• Published: 대한조선학회 2012
• Subjects: 조선공학; Wave force(파력); Motion response(운동응답); Submerged breakwater(잠수 방파제); Dissipation model(소산모델); Transmission coefficient(투과계수); Newton-Raphson method(뉴턴-랩슨법); Boundary element method(경계 요소법); -
• ISSN: 1225-1143; 2287-7355

Hydrodynamic performance of a movable submerged breakwater was analyzed using energy dissipation model. Based on two-dimensional boundary element method the equation of motion including a viscous dissipation term proportional to velocity squared was solved by Newton-Raphson method. Energy dissipation coefficients as well as reflection and transmission coefficients of a submerged flat plate were calculated with various plate lengths and thickness. Both real and imaginary components of body displacement and forces were used to solve the motion of breakwater accurately. The effect of the magnitude of dissipation coefficient on the body displacement was evaluated. The results from the potential theory with no dissipation term were found to be an overestimate in resonance frequency.