以舱段模型代替整艇模型进行噪声估算的可行性探讨

采用结构有限元耦合流体边界元的附加质量附加阻尼算法,对SUBOFF潜艇模型的一个舱段在考虑不同声反射边界条件下的水下辐射噪声进行了数值计算,并讨论了以舱段模型代替整艇模型进行噪声估算的可行性。分析结果表明,不同声反射边界条件下辐射噪声的指向性比较一致,但不同边界条件下辐射噪声的最大声压级误差较大,声反射边界条件对舱段模型辐射噪声的影响不可以简单忽略,为对不同潜艇结构进行噪声估算提供了参考。

Approximate Method for Acoustic Radiated Noise Calculation of Sub Cabin Model in Replacing Full-Scale Model

The paper proposes an additional mass and damping approach combining Finite Element Method（FEM） with Boundary Element Method（BEM） to calculate underwater acoustic radiated noise from a submarine cabin of SUBOFF model taking into account different acoustic reflection boundary conditions.The comparison and analysis of the results show that using a cabin model of submarine replacing a full-scale model for noise estimation is feasible,and demonstrate an agreeable directivity of acoustic radiated noise under different acoustic reflection boundary conditions,while the error of maximal sound pressure level（SPL） are much bigger,thus the influence of acoustic reflection boundary conditions on the radiated noise of cabin model cannot be neglected.The research provides reference for noise estimation of different structures of submarine.