A Roll Damping Prediction Method of Three-Dimensional Ships Based on CFD Computation

Abstract

Abstract: Based on viscous flow theory, the simulations of forced roll of Series 60 were carried out by solving Reynolds averaged NavierStokes(RANS) equations with consideration of free surface effect. Roll damping coefficients of threedimensional ship body rolling at various frequencies and amplitudes which moves with and without forward speed were calculated. The influences of ship roll damping due to amplitudes and frequencies were analyzed. Comparisons of the numerical results of ship roll damping with experimental and potential theoretical ones were conducted. It shows that the presented computational method can give quite precise roll damping coefficients, which are better than the ones by potential theory and agree well with the corresponding experimental ones. It is of great significance to further analyze and predict ship hydrodynamic performance in waves.

Key words: roll damping, viscous effect, numerical simulation

CLC Number:

U 661.32

YANG Chun-Lei, ZHU Ren-Chuan, MIAO Guo-Ping, FAN Ju. A Roll Damping Prediction Method of Three-Dimensional Ships Based on CFD Computation[J]. Journal of Shanghai Jiaotong University, 2012, 46(08): 1190-1195.

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