降低双层加肋圆柱壳低频噪声的声学设计技术

Acoustics Design to Depress the Low Frequency Noise of the Ring-stiffened Cylinder with Double-shell

通过增大双层加肋圆柱壳的刚度降低低频噪声,使用数值仿真技术,评价结构的声学性能,发现增大双层加肋圆柱壳结构刚度,可在低频段有限频率范围降低结构的振动与声辐射。采用增大局部结构刚度的方法,对于降低水下结构的局部振动与低频噪声辐射效果显著。

The low frequency noise of the ring-stiffened cylinder with double shell is depressed by mcreasing structure stiffness, the numerical simulation is adopted to evaluate the acoustics performance, find that the vibration and acoustic radiation of the structure could be depressed by increasing the structure stiffness within the discontinuous range of the low frequency. By using this method, the impact on depressing the partial vibration and the radiation of the low frequency noise of the structure underwater is efficacious.