浅析水下高速航行体对转螺旋桨辐射噪声线谱建模

Preliminary modelling of line spectrum for radiated noise induced by high speed counter rotation of underwater vehicle propellers

分析了某水下高速航行体辐射噪声线谱统计特性,指出对转螺旋桨水下高速航行体线谱主要由螺旋桨“叶片速率”线谱及其谐波频率线谱组成。在此基础上,以周期信号为模型建立了航行体辐射噪声线谱数学模型,并应用该模型对不同转速航行体辐射噪声线谱频率进行了预测。

This paper analyses some statistical characteristics of line spectrum for radiated noise induced by a high speed underwater manoeure vehicle. It proposed that line spectrum is mainly composed of the leave's rate and harmonic frequencies of propellers. On the basis of above research, math model of line spectrum for radiated noise is established by the periodical signal. Line spectrum frequency of different rotational speed underwater vehicles can be predicted by applying the model.