“…The three-dimensional problem involving a vertical circular cylinder has been studied extensively by Hunt & Baddour (1981), Hunt & Williams (1982), Chen & Hudspeth (1982), Kriebel (1987) and Shimada (1987), while Garrison (1984) has developed a method to treat problems involving structures of arbitrary shape. Huang et al (1989) have examined the use of an asymptotic form of the potential at second order in solving the second-order diffraction problems in two and three dimensions. With the use of the asymptotic solution as described by Molin (1979), Kim & Yue (1989) have solved the secondorder diffraction solution for axisymmetric bodies and subsequently extended the method to include bichromatic wave diffraction and body motions (Kim & Yue, 1990).…”