摘要:
为了有效解决运动船舶目标噪声源辐射部位定位问题,通过采用短时积分,分频段能量融合、噪声源相对位置分析等方法克服目标运动的不利因素,提出采用高频段精确定位的常规聚焦波束形成声图法与中低频段精确定位的频域MVDR (MinimumVariance Distortionless Response)波束形成声图法相结合的定位方法。通过海试数据处理验证了该方法可以有效实现目标噪声源辐射部位近场高分辨定位。在进行大型船海试数据处理时,采用分频段、分时间段,并与船体结构布局相结合的方法,分别给出了主要的噪声源辐射部位(螺旋桨、推进电机+柴油发电机、泵舱)的位置,验证了该实验数据处理方法的实用性。
Abstract:
In order to effectively resolve the localization of moving ship's noise source radiation parts,a combining method of the conventional underwater acoustic image measurement on high frequency band and frequency domain MVDR(Minimum Variance Distortionless Response) focused beam-forming measurement on low frequency band was proposed.To overcome disadvantage factor of target movement,short-time integral,dividing frequency band energy fuse and noise sources relative location analysis were adopted.The experimental results from sea trial proved that the combining method could effectively realize the underwater noise sources localization on near field with high resolution. In addition,noise source radiation parts(the place of propeller,impelling engine + diesel oil generator and pump cabin) of large-scale ship were given by the combining way of dividing frequency band,dividing time period and the ship configuration.This work has significant value for the concerned engineering applications.
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