Wave-drift added mass results from nonlinear interactions between waves and low-frequency oscillatory motions of a floating body, in the presence of incident waves. In previous works, wave-drift damping which is the component of wave-drift force in phase with the velocity of low-frequency oscillations was investigated mainly based on a quasi-steady analysis. However, investigations related to wave-drift added mass, the component in phase with acceleration, were very few. In this paper, wave-drift added mass is derived directly from a perturbation analysis with two small parameters and two time scales, using a Cartesian coordinate system that follows the low-frequency oscillations, dynamic oscillation model has been used. Especially, the method to solve higher-order potentials, which are necessary for evaluation of wave-drift added mass, is presented. Analytical solutions and calculated results of wave-drift added mass, and far field radiation conditions for each order of potentials are obtained. Also, wave-drift added mass of floating bodies has been systematically measured from a slowly forced oscillation test or a free decay test in waves. Experimental results are compared with calculated results. Then, for a supplement, the secular behavior that some velocity potentials show is discussed. Applying a multiple scale perturbation analysis to one of these problems, a nonsecular solution is obtained.
Nonlinear Hydrodynamic Forces on an Accelerated Body in Waves
Contributed by the OOAE Division for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received March 30, 2004; final revision, November 8, 2004. Review conducted by: J. Niedzwecki.
- Views Icon Views
- Share Icon Share
- Search Site
Yoshida, M., Kinoshita , T., and Bao, W. (March 23, 2005). "Nonlinear Hydrodynamic Forces on an Accelerated Body in Waves ." ASME. J. Offshore Mech. Arct. Eng. February 2005; 127(1): 17–30. https://doi.org/10.1115/1.1854699
Download citation file: