摘要：In this study, the author newly developed a mathematical hull-form called “generalized Wigley α (G.W α) hull-form” based on the generalized Wigley (G.W.) hull-form which has been proposed in the 1st report to estimate the ship response in waves rationally and easily. It was found in the 1st report that ship responses of full ship can be estimated accurately with the use of the G.W. hull-form except for slender ship. The main reason was found in subsequent investigations to be the difference of 2nd moment of waterplane area between the G.W. hull-form and real ship. In this study, therefore, the author developed an enhanced mathematical hull-form, the G.W α hull-form, with which the 2nd moment of waterplane area can be varied independently of waterplane area. Moreover, the longitudinal asymmetry parameters, longitudinal center of buoyancy LCB and longitudinal center of floatation LCF, were also adopted as the hull-form parameter, which strongly affect the ship response in waves. The proposed G.W α hull-form is expressed in the form of explicit function determined by only 10 principal hull-form parameters. Hence it is suitable for sensitivity calculation of hull-form parameters for ship response. To validate and clarify the applicability domain of proposed hull-form, the author carried out the calculation of ship response in waves for 12 actual ships as well as G.W alpha; hull-forms of the same hull-form parameters as the actual ships. As a result, it was confirmed that the heave, pitch motion and vertical bending moment of proposed hull-forms have good agreement with the actual ships regardless of ship types and wave conditions, and not G.W. α hull-form but G.W. hull-form should be applied for estimation of horizontal bending moment, horizontal shear force and torsional moment.
