EnginSoft - Conference Abstracts

EnginSoft International Conference 2010
CAE Technologies for Industry

Numerical Simulation for prediction of Airborne Ship noise in Harbour

Biot Marco - University of Trieste (Italy)
Moro Lorenzo - University of Trieste (Italy)

Abstract

Nowadays, noise pollution is more and more increasing owing to the growth of industrial production and road and rail traffic. Harbours are certainly ones of the most sensitive areas as, in the last decades, they have become sites for development of industrial activities and goods trades, with a following unavoidable increase in noise pollution. Ship is one of the noise source that most contributes to the overall noise pollution in harbour areas.

The recent European project BESST aims to improve knowledge about ship noise in order to propose proper actions to reduce noise pollution and new uniform criteria and limits for noise radiated to European harbours. Among the various aspects that the scientific community should examine, determination of a proper computational tool to predict outdoor noise generated by ships right in ship’s design phase is one of the main things.

Present study performed by the University of Trieste proposes an operative procedure for predicting ship’s outdoor noise in harbour. Procedure is deeply outlined in all its steps from the pre- to the post-processing phase. Effectiveness of the method has been proved by application to a case study. Results of numerical simulations carried out by the software Raynoise are widely discussed. Moreover, comparison made between calculated and measured SPL values, proves accuracy of proposed method and validates Raynoise based procedure as a powerful tool for reliable predictions.