MEASUREMENTS AND CALCULATIONS OF SHIP RESISTANCE IN WAVES

Abstract : The comparison of the constant-thrust and constant-velocity methods of towing in waves for the measurement of added resistance, as reported in previous experiment, was extended to additional models in regular waves. The results indicate a reasonably good agreement between the two methods. The constant-velocity method was used to test the effect of wave height on added resistance. The results demonstrate that added resistance is proportional to the seond power of the wave height for higher waves only. For low waves the relationship could have considerable variation. There are indications that it may be possible to establish standard series of hull forms for added-resistance calculations from available data.