Prediction and monitoring
One of the risks that shipowners and operators face is that passengers and crew may find the ship ‘noisy’ or ‘causes unpleasant vibration’. This can lead to poor reputation, loss of trade, reduced resale value, and in extreme cases, adverse impact on health and safety.
We can provide solutions for these problems. At the design and build stages, the use of noise and vibration prediction and measurement tools can help minimise the risk of them occurring. At the conclusion of building, and before and during operation, independent certification may be necessary to demonstrate that the ship meets the required noise and vibration criteria.
We undertake independent, impartial noise and vibration investigations of machinery and structures, using a combination of full-scale measurement and theoretical methods. These investigations are designed to isolate the cause of the problems and to evaluate the relative technical merits of potential solutions. Effects of acoustic and structural modifications are estimated using a suite of noise prediction and structural analysis computer programs.
Our surveyors measure noise and vibration levels on ships and offshore vessels to check conformance with the relevant statutory and international requirements. These surveys often lead to recommendations for a variety of noise and vibration control measures. We also publish Provisional Rules for passenger and crew accommodation comfort which can help confirm that your ship complies with noise and vibration criteria.
Benefit from our experience
We have undertaken noise and vibration prediction exercises for ships and offshore vessels for over 25 years. These assignments have included both merchant and naval ships and their results have been validated from full scale trials. We can predict excitation from propulsors and appendages using a range of propulsion hydrodynamic and computational fluid dynamic capabilities. Similarly, excitation from prime movers can be carried out using our simulation methods.
We have a significant acoustic emissions capability in the fields of crack monitoring and leak detection. This technology has been applied to a range of structural and machinery problems.
Summary of benefits
• Rapid solution of noise and vibration problems and reduced risk of re-occurrence.
• Helps minimise downtime or off-hire time.
• Provides the potential for cost savings through proactive application of lessons learned to other vessels in your fleet.
• Impartial service and support worldwide