Viscous Effects in Seakeeping Prediction of Twin-Hull Ships

摘要

Our method to predict seakeeping behavior of twin-hull ships includes effects of viscous damping on hulls and lift and drag on stabilizing fins. The method solves the equations of motions by a modified panel method suitable for twin-hull ships and includes linearized semi-empirical expressions utilizing experimentally determined drag and lift data. The supplemental damping on hulls und stabilizing fins is treated as quasi-steady response to harmonic exciting forces caused by free-surface waves. The sensitivity on vessel response of drag coefficients and lift gradients for hulls and stabilizing fins is discussed.