船舶舱室噪声预示统计能量分析研究(英文)

Study of shipboard noise prediction with SEA

在船舶噪声预示中,统计能量方法与其他方法相比,具有模型简单、计算量小、适应频带宽等优点,且在分析含有高频、高模态密度的复杂系统的耦合动力学问题上有一定的优势.依此为基本原理,以实船为例进行了船舶舱室噪声预示,对影响船舶舱室噪声水平的甲板板厚度等因素进行了分析,表明主机是船舶舱室最主要的噪声源.

Compared with other approaches, the statistical energy analysis (SEA) method needs a much simpler description of the system and has many advantages in analysis of high frequency, high modal density and complex dynamic systems. So the shipboard noise is calculated based on SEA, and the factors affecting the shipboard noise, such as deck plate thickness, are discussed. The results show that the dominant source of shipboard noise is the structure-borne noise emitted by the main engine.