Predicting shipboard noise using 3-D acoustic modeling

Predicting and controlling shipboard noise is a daunting task, particularly when the commonly accepted, one-dimensional prediction approaches are used. Numerous powerful acoustic sources are often located in close proximity to sensitive receiver spaces and the ship’s structures and systems themselves are not amenable to straightforward abatement techniques. In addition, treatments usually impose adverse space, weight and cost impacts yet the crew and passengers need to be protected. This paper presents an alternative to the common spreadsheet and hand calculation methods of shipboard noise analysis. The paper discusses an SEA based noise prediction method. The primary purpose of this engineering prediction method is to facilitate rapid predictions that preserve the accuracy required for the design of effective treatment of shipboard noise. Two case studies are presented indicating the features and application of the tool.