基于半经验法的船舶舱室噪声实用预报方法

基于"声源-传递路径-接受点"系统分析法结合房间声学提出一套半经验型的船舶舱室噪声快速预报方法。噪声的传递和衰减分别按空气噪声和结构噪声两条路径计算,接受点的噪声声压级结合房间声学计算。该方法在总布置方案基本确定阶段即可对全船各舱室噪声分布的水平作出初步预报,并不依赖于具体的结构和舾装细节。通过计算某型快艇的主要舱室噪声水平并与实测数据进行比较,证明了该方法的工程实用性。

Practical prediction of ship cabin noise based on semi-empirical method

A semi-empirical method for the ship cabin noise prediction is put forward based on the system analysis method of “noise source-path-receiving point” and room acoustics. Noise transmission and attenuation are calculated according to the air-borne and structure-borne paths, respectively. And the sound pressure levels in receiving points are calculated combined with room acoustics. Therefore, the noise distribution level of each cabin in the whole ship can be preliminarily predicted during the phase of initial ship general arrangement without dependency on the speciifc details of the structures and outiftting. The cabin noise level of a yacht is calculated and compared with the measured data to demonstrate the engineering practicability of this method.