船舶水下辐射噪声水平指向性测量及试验研究

Research on horizontal directivity measuring method of ship underwater radiated nosie

船舶产生的水下辐射噪声对海洋生物生存环境的影响日益突出,解决水下噪声污染问题迫在眉睫。通过测量船舶水下辐射噪声水平指向性,查明噪声源,进行针对控制,是减小船舶水下噪声污染的有效技术手段。本文提出了一种基于固定式测量系统的船舶水下辐射噪声水平指向性测量方法,具有低频测量能力强、测量效率高,测量窗口期长等特点。通过开展2个相距1 m的754 Hz点源水平指向性测量试验,测量结果和理论计算结果相吻合,证明船舶水下辐射噪声水平指向性测量方法合理可行,测量结果准确。通过测量交通艇水下辐射噪声指向性,查明的低频噪声源位置和已知位置相吻合,说明本文提出的方法具备实船测量的工程实用性。

The influence of ship underwater radiation noise on Marine living environment is becoming more and more prominent,and it is urgent to solve the problem of underwater noise pollution.Measuring the horizontal direction of the ship underwater radiation noise and finding and controlling the noise source is the effective technique to reduce the underwater noise pollution of ship.This paper presents a method of measuring ship underwater radiation noise horizontal directivity based on fixed measuring system,which has the characteristics of low frequency measuring ability,high measurement efficiency and long measuring window.The measurement results of two 754 Hz points source horizontal directionality of a meter apart is consistent with the theoretical calculation results,so the measurement method of ship underwater radiation noise horizontal directionality is feasible and accurate.By measuring the underwater radiation noise horizontal directionality of traffic boat,the low frequency noise source measured position is consistent with the known position,so the method has the practical feasibility of measuring the merchant ship.