船舶机舱集控室声能量分析与降噪设计

Acoustic Energy Analysis and Noise Control Design of Engine Control Rooms on Ships

机舱集控室是船舶最难的噪声控制对象之一。利用VA One软件,基于统计能量法(SEA),建立某平台工作船的SEA模型,进行舱室噪声预测,并与实测值进行比较。分析集控室和它相连所有子系统间的声能量输入关系,得到集控室声能量组成及排序情况,确定空气声和结构声对集控室的影响,将此作为减振降噪依据。根据集控室噪声频谱特性及软件NCT功能,采用声学包设计方法,用不同材料组合对集控室各个面进行降噪处理,最终有效地控制集控室噪声,并为船舶舱室降噪提供一个参考方法。

It is very difficult to control the noise of engine control rooms（ECR） on ships. In this paper, based on statistical energy analysis（SEA） method and using VA One software, the SEA model of a platform support vessel is established. Cabin noise values are predicted and compared with the measured values. The acoustic energy transferring into the ECR from all its connected sub-systems is analyzed and its acoustic energy composition and sequencing type are obtained. The effect of air-borne noise and structure-borne noise on the ECR is determined and used as the basis of vibration and noise control. According to the noise frequency spectrum characteristics of the ECR and the NCT function of the software and using acoustic package design method, noise reduction processing is successfully carried out with different material compositions for each side of the ECR. This study provides a reference method for noise control of ship cabins.