On 3-D pulsating source of Michell type with forward speed

Expression of 3-D pulsating source of Michell type with forward speed for infinite water depth was derived based on the Fourier transformation and contour integration technique. Emphasis was laid on discussing the mechanical feature of the source and the radiation behavior far from the source. The relative features of each components of pulsating source were discussed. Compared with common pulsating source of Haskind type, present expression has the merits of simplicity for numerical treatment and more significance in physical explanation. This expression can be widely used to estimating the motions and wave forces for interaction between ships and offshore structures.