S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Architecture and Architectural Engineering (건축학과) Journal Papers (저널논문_건축학과)
Numerical analysis and validation of weakly nonlinear ship motions and structural loads on a modern containership
- Song, Myung-Jae; Kim, Kyong-Hwan; Kim, Yonghwan
- Issue Date
- PERGAMON-ELSEVIER SCIENCE LTD
- OCEAN ENGINEERING; Vol.38 1; 77-87
- Seakeeping analysis; Weakly nonlinear analysis; Time-domain approach; Nonlinear ship structural loads; Rankine panel method
- This paper aims to validate a numerical seakeeping code based on a 3D Rankine panel method by comparing its results with experimental data. Particularly, the motion response and hull-girder loads on a real modern ship, a 6500 TEU containership, are considered in this validation study. The method of solution is a 3D Rankine panel method which adopts B-spline basis function in the time domain. The numerical code is based on the weakly nonlinear scheme which considers nonlinear Froude-Krylov and restoring forces. The main focus of this study is given to investigate the nonlinear characteristics of wave-induced loads, and to validate this present scheme for industrial use in the range of low Froude number. The comparisons show that the nonlinear motions and hull-girder loads, computed by the present numerical code, have good overall agreements with experimental results. It is found that, for the better accuracy of computational results, particularly at extreme waves in oblique seas, the careful treatment of soft-spring (or compatible) system is recommended to the control of non-restoring motions such as surge, sway, and yaw. (C) 2010 Elsevier Ltd. All rights reserved.
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