Localization experiment research on moving ship's noise source radiation parts

In order to effectively resolve the localization of moving ship's noise source radiation parts,a combining method of the conventional underwater acoustic image measurement on high frequency band and frequency domain MVDR(Minimum Variance Distortionless Response) focused beam-forming measurement on low frequency band was proposed.To overcome disadvantage factor of target movement,short-time integral,dividing frequency band energy fuse and noise sources relative location analysis were adopted.The experimental results from sea trial proved that the combining method could effectively realize the underwater noise sources localization on near field with high resolution. In addition,noise source radiation parts(the place of propeller,impelling engine + diesel oil generator and pump cabin) of large-scale ship were given by the combining way of dividing frequency band,dividing time period and the ship configuration.This work has significant value for the concerned engineering applications.