台风对深海海洋环境噪声的影响

发布时间：2018-06-29 20:04

本文选题：台风 + 海洋环境噪声　；参考：《中国科学:物理学力学天文学》2016年09期

【摘要】：中低频海洋环境噪声受海表面风速的影响显著,台风经过时,海表面风速在短时间内迅速增大,因此海洋环境噪声强度显著增加.本文通过分析两次台风经过垂直接收阵附近时接收器记录的海洋环境噪声,研究了台风条件下,环境噪声强度随风速和频率变化的关系.文中结合风成噪声源级模型和台风激发的水下噪声场模型对台风影响下的深海环境噪声场进行了理论仿真,并将仿真结果与实测噪声数据进行最小二乘曲线拟合,得到噪声源级模型中风速和频率的指数项系数的取值.结果表明:台风对高频噪声的影响更显著,200 Hz以下的噪声受风速变化的影响较小.环境噪声强度近似与风速的三次方成正比,且当风速的指数项为3时,频率的指数项取值在-0.85附近.
[Abstract]:The medium and low frequency environmental noise is influenced by the wind speed of the sea surface. When the typhoon passes, the wind speed of the sea surface increases rapidly in a short time, so the noise intensity of the sea environment increases significantly. Based on the analysis of the environmental noise recorded by the receiver when two typhoons pass by the vertical receiving array, the relationship between the environmental noise intensity and the wind speed and frequency under the typhoon condition is studied in this paper. In this paper, the noise field in deep-sea environment under the influence of typhoon is simulated theoretically by combining the wind-induced noise source level model and the underwater noise field model induced by typhoon, and the simulation results are fitted with the measured noise data by the least square curve. The exponential coefficients of wind speed and frequency in the noise source level model are obtained. The results show that the influence of typhoon on high frequency noise is more obvious than that of 200 Hz noise, which is less affected by wind speed change. The intensity of ambient noise is approximately proportional to the third power of wind speed, and when the exponential term of wind speed is 3, the exponential term of frequency is about -0.85.
【作者单位】：中国科学院声学研究所声场声信息国家重点实验室;中国科学院大学;
【基金】：国家自然科学基金资助项目(编号:11125420)
【分类号】：P444;P733.22

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