中文摘要：

为了提高水下结构声学计算的效率,采用有限元软件进行水下圆柱壳结构声辐射分析,建立声学分析近似代理模型,给出壳体结构几何尺寸与水下声辐射特性的显式解析表达式,简化声学计算,建立高效的结构声学优化设计模型。利用拉丁超立方取样方法进行样本点的选取,分别采用多项式响应面法、Kriging函数和径向基函数法构造水下双层圆柱壳结构的声辐射代理模型。通过比较三种代理模型的拟合精度,选择三种代理模型建立双层圆柱壳结构水下声辐射优化设计模型,并采用Matlab进行尺寸优化,减轻了结构质量。该研究为水下结构声辐射预报和声学设计提供参考。

英文摘要：

To improve the efficiency of underwater structure acoustic calculation, the FE software is used to analyzethe sound radiation of an underwater cylindrical shell structure. An acoustic approximate agent model is established. Then,the analytical expression of the relation between the geometry size and underwater acoustic radiation characteristics of theshell structure is given to simplify the acoustic computation. An efficient structural acoustic optimization design model isestablished. The Latin Hypercubic Sampling method is utilized to select the sampling points. Using three types of surrogatemodels, polynomial response surface fitting, Kriging function and radial basis neural network, the acoustic radiation modelof the double cylindrical shell structure is established for optimal design. Through comparison of the accuracy of three typesof surrogate models, the appropriate surrogate models are chosen to construct the optimization model. The optimizationmodel is solved by using Matlab optimization toolbox. As a result, the weight of the shell structure is reduced. This researchprovides references for predicting the acoustic radiation and performing the acoustic design of underwater structures.