水下加筋板振动声辐射的代理模型研究  

Research on surrogate models for structural vibration and acoustic radiation of underwater stiffened plates

作　　者：黎胜[1,2] 杨婧媛[1,2] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,大连116024 [2]大连理工大学船舶工程学院,大连116024

出　　处：《声学学报》2010年第6期659-664,共6页Acta Acustica

基　　金：国家自然科学基金资助项目(10972046)

摘　　要：基于kriging模型建立了水下结构振动声辐射计算的代理模型,可对水下结构的共振频率和声功率级进行预测。还将主分量分解和kriging模型相结合建立了可对整个计算频段内的振动声辐射响应进行预测的代理模型。这些代理模型可以基于样本信息在整个设计空间对水下结构的振动声辐射响应进行实时预测。文中以水下加筋板的振动声辐射为例进行了代理模型的构造和验证。计算结果表明:使用基于kriging方法的代理模型预测水下结构的共振频率及声功率级具有非常高的精度;使用基于主分量分解和kriging模型的代理模型预测整个计算频段内非共振频率处的声功率级响应也具有很好的精度。在水下结构振动声辐射的设计优化中,可以根据需要单独或联合使用这些代理模型。The surrogate model based on the Kriging model is applied to predict resonant frequency and corresponding sound power level of underwater structural vibration and acoustic radiation.The principal component decomposition is combined with the Kriging model to construct a surrogate model for predicting vibro-acoustic response in the frequency band of interest.These surrogate models give the vibro-acoustic response results in the whole design space in real time based on sample information.An underwater stiffened plate is involved to show the building and verification of the surrogate models.The results show that the Kriging model predicts the resonant frequency and corresponding sound power level with high accuracy.The surrogate model based on the principal component decomposition and the Kriging model gives good approximation of the sound power level in the whole frequency band except at the resonant frequency. The surrogate models can be properly used for design optimization of underwater structural vibration and acoustic radiation.

关 键 词：振动声辐射 代理模型 水下结构 加筋板 KRIGING模型 KRIGING方法 主分量分解 辐射计算 

分 类 号：O422.6[理学—声学]