2025-2027

Reducing underwater noise

We develop metamaterial-type underwater solutions to reduce flow-induced noise and create a quieter acoustic environment at sea, which is crucial for developing sustainable, reliable, and affordable offshore energy systems in the circular economy and preserving a safe living space for fish.

Underwater pipelines play a vital role in subsea infrastructure and offshore renewable energy technologies. However, turbulent flows in pipes, pumps, and other equipment can generate noise that threatens marine life by disrupting animal communication, while also contributing to wear and damage to pipeline infrastructure. Understanding and mitigating these effects is essential for developing quieter, more durable, and environmentally sustainable technologies.

Developing test facilties

We began by constructing and characterizing a dedicated water tank experimental facility to investigate the vibro-acoustic behaviour of submerged pipe systems under controlled conditions. The setup enables reliable measurements of pipe vibrations and underwater noise, providing a platform for evaluating noise-reduction solutions such as acoustic tapes. It also incorporates tilt and vibration sensors to assess their suitability for monitoring structural vibrations in an underwater environment. This work was conducted by Sil Postma and Quentin Hopman.

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Towards underwater noise reduction

Next, we investigated the performance of acoustic protection solutions designed to reduce flow-induced underwater noise generated by submerged pipe systems. Their effectiveness is evaluated through comprehensive experiments in the water tank, using an array of hydrophones to measure underwater sound levels and assess noise reduction under controlled conditions. The results are helpful to identify effective strategies for reducing underwater noise and minimising its impact on marine life.

Towards pipe vibrations reduction

Finally, we investigate the mechanisms behind flow-induced vibrations in submerged pipelines and explores strategies to minimise their impact. Experimental measurements are used to assess vibration levels in air and underwater and evaluate the effectiveness of different mitigation techniques. The ultimate goal is to reduce structural vibrations, improve pipeline durability, and contribute to quieter and more sustainable underwater infrastructure. This is ongoining project conducted by Rens Bartelink and Quentin Hopman.