浅水有界水域水下目标辐射噪声测量修正方法

Correction method of underwater target radiated noise measurement in shallow bounded waters

摘要:

由于适合水下目标辐射噪声测量的理想水域较少，因此测量试验大多在浅水有界水域开展，测量结果难免会受到试验现场界面反射波影响，导致测量的宽带声压级及各频率声压谱级产生偏差。利用虚源法对浅水有界水域下的声场模型进行了数值仿真，重点分析了导致传播损失异常的各项因素，然后基于脉冲声技术提出了一种水下目标浅水有界水域辐射噪声测量结果的修正方法，并进行了外场辐射噪声测量和传播损失异常值标定验证试验，最后对试验数据的测量结果进行了修正。

Abstract:

Since there are few suitable waters for the measurement of radiated noise of underwater targets, most of the measurement tests are carried out in shallow bounded waters, and the measurement results will inevitably be affected by the reflected waves from the interface at the test site, resulting in the deviation of the measured broadband sound pressure level and the sound pressure spectrum level of each frequency. Using the image source method, the numerical simulation of the sound field model in shallow bounded waters is carried out, and the factors that cause the abnormal transmission loss are analyzed. Based on impulse sound technology, a correction method for the measurement results of radiated noise of underwater target in shallow bounded waters is proposed, and the external field radiation noise measurement and the transmission loss abnormal value calibration verification test were carried out, and finally the measurement results of the test data were corrected.