为探讨水-空气多介质条件下的封闭舱室水下噪声预报方法,以某10万吨级养殖工船的养殖水舱为研究对象,针对300～900 Hz频段,采用统计能量分析(Statistical Energy Analysis,SEA)法、有限元与边界元耦合法对养殖舱室结构进行辐射声场仿真与试验,将SEA法得到的结构响应速度作为边界元模型的边界条件,研究分析封闭舱室不同介质内的噪声贡献量.通过实船测试结果进行验证:数值仿真虽然存在误差但此差值在误差范围之内;在养殖舱内噪声分布方面,预报值与实测值呈现相同的分布趋势.研究方法对同类型及相似船舶舱内水下噪声预报有一定的参考意义.
Prediction and Test Verification of Underwater Noise in Aquaculture Cabins
In order to explore the methods for predicting underwater noise in enclosed cabins under the condition of water-air multi-medium,taken the breeding water tank of a 100 000 t breeding factory ship as the research object,aimed at the analysis frequency band of 300-900 Hz,the Statistical Energy Method(SEA),finite element and boundary element coupling method are used to simulate and test the radiation sound field of the breeding cabin structure,the structural response velocity obtained by SEA is used as the boundary condition of the boundary element model and the noise contribution in different media of the enclosed cabin is analyzed.It is verified through the actual ship testing results that:although there are errors in the numerical simulation,the difference is within the error range;in terms of noise distribution inside the breeding cabin,the predicted and measured values show the same distribution trend.The research method is of certain reference significance for predicting underwater noise in cabins of the same type and similar ships.
enclosed cabinunderwater radiation noise predictionStatistical Energy Method(SEA)boundary element methodfinite element methodtest verification
NETL
NSTL
万方数据
