【作者】 吴健； 黄红波； 王婕； 王纬波；

【Author】 WU Jian;HUANG Hong-bo;WANG Jie;WANG Weibo;China Ship Scientific Research Center,National Key Laboratory on Ship Vibration & Noise;Jiangsu Key Laboratory of Green Ship Technology;COSCO(Nantong) Shipyard Co.,Ltd;

【机构】 中国船舶科学研究中心船舶振动噪声重点实验室； 江苏省绿色船舶技术重点实验室； 南通中远船务有限公司；

【摘要】 以N503型半潜支持平台为对象,分析平台的水下辐射噪声特性。通过有限元法和声学无限元法建立平台的流固耦合实尺度模型,采用主要动力设备的实测加速度数据作为激励源,计算平台的低频水下结构辐射噪声;通过循环水槽开展缩比模型的推进器辐射噪声试验,获得多个功率状态下模型推进器的辐射噪声,结合相似关系得到实船推进器的辐射噪声。结果表明:半潜支持平台低频结构辐射噪声与推进器和主机的源特性密切相关,不同功率条件下的推进器辐射噪声曲线相似,随着输出功率增加显著增大。分析结果可为半潜支持平台的水下噪声研究提供参考。更多还原

【Abstract】 Acoustic radiation of N503 semi-submersible support platform is analyzed.Fluid-solid coupling real scale model is established by finite elements and acoustic infinite elements.Measured acceleration data of main power equipment are used as the excitation source.Underwater low frequency structure noise of platform is calculated.Scaled propeller model radiated noise of N503 semi-submersible support platform is tested in water channel and model radiated noise is obtained under multiple output power states.Radiated noise of real scale model is calculated by conversion relationship.Results show Structural radiated noise of semi-submersible support platform is closely related to the source characteristics of propeller and main engine.The radiated noise curves of propeller under different power conditions are similar and it increases significantly with the increase of output power.Analysis results can provide reference for underwater noise research of semi-submersible support platform.更多还原