Investigation of the seakeeping performance of twin hull vessels by different computational methods [以不同計算方法研究雙體船的耐波性能]
Journal
Journal of Taiwan Society of Naval Architects and Marine Engineers
Journal Volume
37
Journal Issue
3
Pages
127-136
Date Issued
2018
Author(s)
Abstract
The seakeeping performances of wave piercing high speed catamaran (CAT-I) was computed and analyzed by different computational methods in this paper. The purpose is to investigate the hydrodynamic characteristics of twin hull vessels for installing the motion suppressing devices such as RCS (riding control system). The potential flow method and viscous flow RANS (Reynolds Averaged Navier-Stokes) method were used for computations. The comparisons of results from different computational methods serve two objectives. The first one is for the verification purpose to ensure the accuracy of computations. Secondly, by comparing results with experimental data, the results not only show the numerical errors, but also reveal the different features of each method. For example, the viscous and nonlinear effects of forces and flow field can thus be identified. From the preliminary results, the comparisons between numerical predictions and experimental data show a good agreement for seakeeping performances, as well as some differences near the resonance frequencies. Overall, the viscous flow RANS method demonstrates better predictions in seakeeping based on the verification and validation analysis. ? 2018 Taiwan Society of Naval Architects and Marine Engineers. All rights reserved.
Subjects
Computational methods
Finite element method
Hulls (ship)
Navier Stokes equations
Numerical methods
Ocean currents
Sailing vessels
Seakeeping
Turbomachine blades
Viscous flow
Current turbines
Hydrodynamic characteristics
Kuroshio
RANS
Resonance frequencies
Reynolds - Averaged Navier-Stokes
Seakeeping performance
Verification-and-validation
Boundary element method
SDGs
Type
journal article