Simulation of short distance through signature considering multi-radiated sources of a ship

Owing to the fact that the radiated noises of three special sections of a ship (stern, the section between the stern and the midway of a ship, midway of a ship) present distinguished features of their power spectrum, it will be advantageous is significant to make use of them. In the present research, the simplified "three highlights" model for the ship-radiated noise at short distance is adopted to approach the continuous spectrum in these special sections. The convolution algorithm using a sliding time-window is used to regenerate the noise sequence of a special radiated source, the noise sequence has both specified amplitude probability distribution and desired power spectrum feature. Based on the reconstruction of the time-domain signals of the different radiated noise sources, the through signature and the additional effect of the three noise sources has been simulated. The results of simulation of the noise process are close to the actual testing data for a certain ship, both exhibiting the similar spectrum features.