关键词: 实验数据/
准周期随机声脉冲序列/
爆炸型余弦脉冲信号
English Abstract
Theoretical model and simulation of ship underwater radiated noise
Sun Jun-Ping1,4,Yang Jun2,
Lin Jian-Heng1,3,
Jiang Guo-Jian1,
Yi Xue-Juan1,
Jiang Peng-Fei1
1.Qingdao Branch, Institute of Acoustics, Chinese Academy of Sciences, Qingdao 266023, China;
2.Key Laboratory of Noise and Vibration Research, Chinese Academy of Sciences, Beijing 100190, China;
3.Key Laboratory of Underwater Acoustic Environment, Chinese Academy of Sciences, Beijing 100190, China;
4.University of Chinese Academy of Sciences (Institute of Information Engineering), Beijing 100049, China
Fund Project:Project supported by the National Natural Science Foundation of China (Grant Nos. 11174314, 11204345, 11474301) and State Key Laboratory of Acoustics, Chinese Academy of Sciences, China (Grant No. SKLA201502).Received Date:25 November 2015
Accepted Date:01 April 2016
Published Online:05 June 2016
Abstract:Ship underwater radiated noise is one of the most important ocean ambient noise sources, and building a reasonable model for the ship underwater radiated noise is helpful for understanding the physical mechanism and reducing research cost of ship underwater radiated noise. The quasi-periodic random sound pulse sequence signals act well in explaining the rhythm and the power spectrum variation of the ship underwater radiated noise, and reveal that there are not any real sinusoidal components in ship radiated noise signals, which come from the non-linear transformation of the signals, and the analysis of some representative experimental data of ship radiated noise also supports this idea. Based on this, the explosion-type cosine pulses are used as the units of quasi-periodic random sound pulse sequences. This model can generate the power spectrum with a peak, and the peak location can change with ship velocity or ship type. The power spectrum variation characteristics of quasi-periodic random sound pulse sequences consisting of the explosion-type cosine pulses are in good agreement with the measured ship underwater radiated noise data, which shows that this model is of important practical value.
Keywords: experimental data/
quasi-periodic random sound pulse sequence/
explosive cosine pulse signal
