船舶辐射噪声主动模拟技术研究

Active Simulation Technique Research of Ship's Radiation Noise

本文在简要分析船舶辐射噪声时域特征与频域特征的基础上 ,指出了宽带随机声辐射的难点与解决办法 ,系统地论述了声场功率谱控制的原理、反馈控制方式和多频段控制技术 ,介绍了船舶辐射噪声特征提取与模型变换方法及参考谱建库要点 ,提出了模拟器的实现方案 ,并通过声场谱图验证了模拟效果。

In this paper, the time-domain & frequency-domain features of ship's radiation noise are analyzed summarily. The difficulties and solutions of the wide-band random acoustic radiating are pointed out. The principle , feedback way of acoustic power spectrum control and its multi-band control technique are explained systematically. The methods to recover characters of the noise and to convert from acoustic to vibrational of RSP model and the keys to establish RSP's data base are introduced . Realizing scheme of the noise simulator is put forward. The simulating effect is proved by acoustic spectrogram.