Simplified Formulas for the Calculation of Added Resistance, Steady Lateral Force and Turning Moment in Waves

Abstract

In order to calculate the added resistance in following waves, Maruo and Iwase's simplified formula for the calculation of the added resistance in waves is improved. Applying their assumption, simplified formulas for the calculation of the wave induced steady lateral force and turning moment are developed. The singularity distribution for the calculation of the wave induced steady forces on the assumption of the slender body is investigated and the importance of the continuity at the end point is shown. Some numerical results by simplified formulas are compared to the exact solution. The precision of numerical results by simplified formulas are good enough for the practical use.