Line spectrum noise of mechanical system is an important feature of underwater acoustic detection and iden-tification,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 identifi-able 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.
关键词
线谱噪声/展频运行/机械系统
Key words
line spectrum noise/spectrum expansion/mechanical system
维普
万方数据