인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
A reliable assessment of large-amplitude roll phenomena such as parametric roll requires an accurate characterization of roll damping. In this study, free roll decay model tests were conducted on the Duisburg test case container ship at large initial heel angles exceeding 30°, and linear and nonlinear roll damping coefficients were determined from the free decay results using the Froude energy method. The roll time series was reproduced with the fourth-order Runge–Kutta method using the estimated damping coefficients and compared with the experimental results. In addition, the speed dependence of the damping characteristics was examined using an equivalent linear damping coefficient. In the large-amplitude free roll decay tests, linear damping alone was insufficient to reproduce the measured response, whereas including a quadratic nonlinear damping term substantially reduced the prediction error. In addition, the damping coefficients identified from the small-amplitude region of the large-amplitude free roll decay tests underestimated the damping in the large-amplitude regime. The equivalent linear damping coefficients further showed that damping increased with the forward speed. These results suggest that an accurate prediction of large-amplitude roll responses requires nonlinear damping coefficients obtained from large-amplitude free roll decay tests.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.