ANALYSIS OF DIFFERENCES IN THE UNDERWATER RADIATIED NOISE OF SHIPS IN THE PORT APPROACH ZONE

摘要

This paper presents the study of underwater noise generated by moving ships associated with the vibration measurements and analysis inside the hull. Two particular areas of noise generated by moving ships in the environment are shipping lanes and approaches to ports. From 2012 to 2015 the Polish Naval Academy in Gdynia participated in a study of ship noise as a participant in the European Defence Agency project SIRAMIS. The study focused on the signature response analysis on multi-influence sensors. During the sea trials, over sixty vessels were measured, and the data analysis found that significant differences exist not only between different classes of vessels but also per vessel. To explain these differences, measurements of vibrations inside a ship's hulls were made. The tests took place on one ship that sailed to Gdynia's port many times. The results of comparing the underwater noise of the ship with the vibrations of the mechanisms and the hull plating are presented in this article.