基于少量测点的水下辐射噪声评估模型

摘要

Aiming at real-time evaluation of the underwater noise radiated by complex structures, a theoretical model is proposed based on the operational transfer path analysis for signals with line spectra. The number of required sensors is reduced, and the joint application of operational condition classification and this model also improve the accuracy of noise radiation evaluation. This model is verified by numerical simulation and validated by a lake experiment. The results show that the pro-posed model is simple and effective: the errors of noise radiation evaluation in most frequency bands are less than 2 dB, and the errors at most peak frequencies are less than 2.5 dB. This study may be useful to ship noise evaluation.%文章针对复杂结构的水下辐射噪声实时评估问题，提出了一套基于工况传递路径法的线谱条件下理论模型，在确保辐射噪声评估准确性的同时，减少了传感器的使用数量。模型与工况分类相结合，提高了辐射噪声的评估精度。之后对该模型进行了数值仿真和湖上试验验证，结果表明，提出的模型简单有效。频段辐射噪声评估误差小于2 dB，多数线谱峰值频率处误差小于2.5 dB。该研究对船舶噪声评估具有参考意义。