机械系统线谱噪声是重要的水声探测和识别特征，减振降噪技术主要针对其量级进行控制。针对线谱能量在频域集中的特征，提出一种展频运行策略，可在功能不变的同时将其能量在频域进行展宽，削弱其可供识别的频域特征。船用离心泵台架试验表明，提出的展频运行策略工程可行，随着频率分辨率的细化降低线谱峰值的效果可达7～15 dB。
Line spectrum noise of mechanical system is an important feature of underwater acoustic detection and identification, vibration and noise reduction technology is mainly controlled for its magnitude.Aiming at the characteristic that its energy is concentrated in the frequency domain, a spectrum expansion operation strategy is proposed. The vibration energy can be broadened in the frequency domain under the premise that the function remains unchanged with attenuated identifiable frequency domain feature. The test of marine centrifugal pump shows that the proposed spectrum expansion strategy is feasible, with finer frequency resolution, the effect is 7～15 dB.
2024,46(4): 57-60 收稿日期：2022-11-13
DOI：10.3404/j.issn.1672-7649.2024.04.011
分类号：U662.2
作者简介：孙国仓(1977-)男,博士,研究员,研究方向为舰船减振降噪设计
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