The Calculation Of3D Ship’s Motion In Frequency Domain

The theory of3D ship’s motion on wave at a forward speed(short as ’3D Theory’) is generally a classical issue. The theory relating with the panel method have been rapidly developed, since Hess and Smith’s significant work had been published. And of course, that process values a lot for the3D Theory. These days, not only the constant panel method has been developed, but also the high-order panel method. Many researchers have had some calculational results(such as ships’ movement amplitude and the force ships yield)accurately. More over,both the fluid’s viscidity and the non-liner character of free surface have been considered to analyse their influence on ship moving. However, although the classical3D theory has been increasingly completed, its detail is always focused and analysed by scholars, who also develop it at the same time. Therefore, the classical3D Theory is still regarded as an important tool to research the physical phenomenon during the ship’s responsive movement. For example, the m-terms enable the analysis about the coupled influent between the wave inducing process and ships’ movement, and also the Green function’s research can be used to study the movement’s pattern.The thesis’s major work is to complete Fortran codes to calculate a ship’s movement when it is moving forward, by the classical3D theory, and using the Havelock translating source and the constant panel method.The combination of panel triagle and panel quadrangle are used to disperse ships’ hull.The thesis’ work can be developed using high-order panel furthermore, not difficultly.This thesis also particularly studies the mathematically character of the integral function of Havelock source, and put up with two numerical calculation methods, namely the common numerical integral method and the approximate analytical solution. The Havelock source can be solved out efficiently by our method.In the last, our calculation results are compared with other researchers’ work, and the compare proved that our work can be applied practically.