双层圆柱壳异常噪声源定位试验研究与应用  

Research and application of abnormal noise source positioning experiment based on double cylindrical shell

作　　者：李瑞彪[1,2] 徐荣武[1,2] 崔立林[1,2] 余文晶[1,2] LI Ruibiao;XU Rongwu;CUI Lilin;YU Wenjing(National Key Laboratory on Ship Vibration and Noise,Naval University of Engineering,Wuhan 430033,China;Institute of Noise and Vibration,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学船舶振动噪声重点实验室,湖北武汉430033 [2]海军工程大学振动与噪声研究所,湖北武汉430033

出　　处：《中国舰船研究》2017年第4期140-146,共7页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(51209214)

摘　　要：[目的]针对船舶舷外异常噪声频发的问题,[方法]提出异常噪声源定位方法,建立定位模型,并通过双层圆柱壳试验进行验证。模型以广义互相关时延估计方法计算的时间延迟为输入,以传统双曲定位为基础,通过改进的基于圆柱壳体的双曲定位方法求解噪声源位置坐标。试验中,用敲击信号模拟舷外异常噪声源,对比分析传统双曲定位方法和基于双层圆柱壳的双曲定位方法这2种方法的定位精度,讨论时延估计对定位精度的影响。[结果]试验结果表明,基于双层圆柱壳的双曲定位方法可以准确定位异常噪声源的位置,在船舶舷外异常噪声源定位中具备可行性。[结论]所得结果可为船舶舷外异常噪声源定位提供一定的理论指导。Aiming at the problem of frequent abnormal outboard noise in ships,an abnormal noise source location method is proposed,and a location model checked by the double cylindrical shell experiment is built.The model calculates the coordinates through the improved hyperbolic positioning method on the basis of the traditional hyperbolic positioning method,with the time-delay estimation by the generalized cross-correlation method as the input.In the process of the experiment,the outboard abnormal noise source is simulated by the percussion,comparing the positioning accuracy of the two methods and analyzing the influence of time-delay estimation on positioning accuracy.The results show that the hyperbolic positioning method based on double cylindrical shell can accurately locate the coordinates of abnormal noise sources,and is feasible for the abnormal outboard noise source positioning of ships.In addition,the method can provide theoretical guidance for the location of abnormal outboard noise sources.

关 键 词：船舶 异常噪声 双曲定位方法 时延估计 

分 类 号：U672[交通运输工程—船舶及航道工程]