高速船全频段舱室噪声仿真预报

Full Spectrum Simulation Prediction of High-Speed Vessel Cabin Noise

鉴于有限元法(FEM)和统计能量法(SEA)在求解中频段船舶结构振动噪声问题中的有限性,引入有限元—统计能量(FE-SEA)混合法。介绍其基本原理的基础上,运用VA One振动噪声分析软件,采用有限元法、FE-SEA混合法和统计能量法分别求解低频、中频和高频段高速船舱室噪声,以此实现高速船舱室噪声问题的全频段分析。通过对比仿真值与实验值,证明应用FE-SEA混合法预报高速船中频段舱室噪声问题是有效可行的。

Based on the limitations of the Finite Element Method（FEM） and Statistical Energy Analysis（SEA） in solving the mid-frequency noise and vibration problems of ship structure,the paper introduced Hybrid FE-SEA method,which could perform in mid-frequency acoustic environment of complex structure.With the application of the noise vibration analysis software VA One,the paper respectively calculated the low frequency,mid-frequency and high frequency cabin noise by the finite element method,FE-SEA hybrid method and statistical energy method,thus to realize the full spectrum simulation prediction of high-speed vessel cabin noise.By comparing the simulation with experimental data,the results prove that the FE-SEA hybrid method is feasible and effective for the mid-frequency prediction of high-speed craft cabin noise.