Research on the Method of Judging the Transfer Path of Warship Transient Noise Excitation Source based on Information Similarity

The warship is a very complicated system with many equipments and many excitation sources which can produce transient noise. Transient noise is mainly transmitted to the hull through elastic installation, pedestal and other supporting structures and non-supporting structures such as pipelines and cables. The vibration energy passes through the hull to the acoustic field and forms the radiated noise. Therefore, how to quickly and effectively find out the excitation source of ship transient noise has important military significance. It is difficult to distinguish the transmission channel of the excitation source of the transient noise because of the variety of ways of generating the transient noise and the interference of the mechanical noise. This makes the problem of excitation source discrimination become one of the important research directions of warship transient noise analysis. This paper aims to solve the problem of identifying the main transmission path of the excitation source. In this paper, through the study of principal component decomposition, instantaneous information similarity and so on, combined with the physical model of vibration transfer path, the main transfer path discrimination method suitable for the warship transient noise excitation source is established, and the validity of the method is verified by theoretical simulation.