摘要
根据模型与实艇舱段结构的声学相似关系,将模型测量的激振力、壳体加速度到水中辐射噪声的传递函数换算到实艇,利用这个传递函数可以根据实艇测量的激振力以及振动加速度预报艇体辐射噪声。采用通用程序进行了模型水下声辐射计算,将计算结果与测量结果进行对比,两者在1/3oct频带范围能够符合,但频谱结构差别仍然较大,这表明采用目前已有数值分析手段,可以对加肋圆柱壳舱段结构水下辐射噪声性能进行初步估算,要获得较准确的结果仍然需要进行模型试验。模型结构水下声辐射试验在水库中完成。
The measured transfer functions from force or structural acceleration to radiated sound were transformed to real structure according to the correspondent relationship between model and full - scale compartment. By using such transfer function, radiated sound from full - scale compartment can be predicted from measured mechanical exciting force and structural acceleration. Computations are also carried out by using general software. The theoretical and measured results can be agreed with each other within 1/3 oct frequency band , but have a relatively large gap within narrow frequency band. It shows that existed simulation means can be used to get a estimation of underwater radiated sound from ring - stiffened compartment, it is still necessary to carry out model test in order to acquire a good result. This paper describe underwater sound radiation test of a ring stiffened cylinder. The model test is carried out in a reservoir.
出处
《中国舰船研究》
2006年第1期13-16,40,共5页
Chinese Journal of Ship Research
基金
国防"十五"重点课题(4131004014)
关键词
双层圆柱壳
液固耦合
水下声辐射
模型试验
double cylinder
fluid- structure coupling
underwater sound radiation
model test
作者简介
曾革委（1968-），男，博士，高级工程师；研究方向：船舶结构设计、结构噪声控制等
