船舶噪声源的传递率矩阵识别方法及试验验证

Transmissibility matrix method for identification of ship noise source and corresponding test verification

针对现有方法在船舶振动噪声源识别中存在的不足,引入传递率矩阵方法(Transmissibility Matrix Method,TMM),全面分析了其在实际应用中存在的问题,并提出解决方案。着重探讨解决振源之间交叉耦合的方法,提出一种新的基于TMM的振-声传递路径分析模型,新模型以隔振器两端的位移响应之差作为输入振源,有效地避免了振源之间的耦合。通过船舶水中振动-声辐射仿真分析和实船海上振动-声辐射试验验证了新模型在船舶噪声源识别和贡献量分析中可行性与正确性。新模型在船舶振动噪声源识别中保持效率的同时提高了分析的准确性,现代船舶中隔振器的广泛应用,为该方法的应用提供了先决条件,因此具有广阔的工程应用前景。

For the problem that the existing methods are difficult to identify main noise sources of the ship efficiently, a trans- missibility matrix method （TMM） is introduced. The main problems of TMM facing in the practical application were analyzed, and the methods used to solve those problems were also proposed. In order to investigate the method which can solve cross- coupling of vibration sources, a new vibro-acoustic transfer path model for analysis based on TMM was established. The dis- placement response difference of isolator at both ends was considered as the equivalent vibration source, which avoided cross- coupling of vibration sources efficiently. By Combining simulation analysis and the test of ship vibration and acoustic radiation in the water, the feasibility and correctness of the new model which is used to identify noise sources and study the noise contri- bution are validated. The results indicate that the new model can effectively identify and quantify noise source of ship which maintains the efficiency and also improves the accuracy. Since resilient isolators are extensively used in modern ship, which provide a precondition for widely applying the proposed method. Therefore the new method established in this paper has broad prospect of engineering application.