BURNSi ORCA class acoustic and vibration characteristics
The objective of the intended international workshop on Benchmark Underwater Radiated Noise Simulations is to contribute to the knowledge and understanding of underwater radiated noise of naval platforms generated by machinery and hydrodynamic noise. The workshops will be a cooperative effort of the Defence organizations of Canada (DRDC²), Germany (WTD71³) and the Netherlands (DMO¹). This workshop will involve the prediction of radiated underwater noise of a ship using numerical methods and an available data set of onboard vibration measurements. Information and technical data of an ORCA-class training vessel of the Royal Canadian Navy can be made available for this purpose. The necessary acoustic and vibration data for the workshop were gathered during two measurement trials with PCT (Patrol Craft Training) MOOSE at the Patricia Bay (Pat Bay) sound range near Victoria, Canada. Preliminary analysis shows that the overall underwater radiated noise signature is caused by noise generated by the propulsion diesels, the gearboxes, the diesel generator sets and both propellers. In the light of the measurement results, the objective for the workshop is to predict the individual contributions of the main machinery and hydrodynamic sources to the total underwater radiated noise levels.