Second-order Wave Forces Acting on a Horizontal Circular Cylinder in Irregular Waves
A consistent theory of the second-order wave forces acting on a horizontal cylinder in irregular waves is presented. Second-order boundary conditions imposed on body and free surface are exactly taken into account. One emphasis in this study is placed on the treatment of the second-order free surface condition which oscillates with the difference of wave numbers of two regular waves and never decay even at infinity. Free surface integral method is applied for obtaining second-order forces, in which asymptotic solutions of the first- and second-order quantities are effectively used. The results of calculations are discussed in comparison with experiments. in regular and bichromatic waves show good agreements with experiments.
KeywordsRegular Wave Irregular Wave Wave Tank High Frequency Part High Frequency Response
Unable to display preview. Download preview PDF.
- 2.Herfjord, K.; Nielsen F.G.: Nonlinear wave forces on a fixed vertical cylinder due to the sum frequency of waves in irregular seas, Appl. Ocean Res., Vol. 8, No.1, (1986) 8–21Google Scholar
- 3.Lee, C.M.: The second-order theory for nonsinusoidal oscillations of a cylinder in a free surface, 8th Symp. Naval Hydrodyn., (1970), 905–950Google Scholar
- 4.Söding, H.: Second-order forces on oscillating cylinders in waves, Schiffstechnik, Vol. 23, (1976) 205–209Google Scholar
- 5.Molin, B.: Second-order diffraction loads upon three-dimensional bodies, Appl. Ocean Res., Vol.1, No.4, (1979) 197–202Google Scholar
- 6.Kyozuka,Y.: Non-linear hydrodynamic forces acting on two-dimensional bodies (first report), J. Soc. Naval Arch. of Japan, Vol. 148, (1980) 49–57Google Scholar
- 7.Kyozuka, Y.: Experimental study on second-order forces acting on a cylindrical body in waves, 14th Symp. Naval Hydrodyn. (1982) 319–379Google Scholar
- 9.Miao, G.P.;Liu Y.Z.: A theoretical study on the second-order wave forces for two-dimensional bodies, 5th Int. OMAE Symp., Vol.1, (1986) 330–336Google Scholar