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Wind tunnel demonstration of galloping mitigation with a purely nonlinear energy sink

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A ball free to roll in a circular track acts as a Nonlinear Energy Sink (NES) and delays the occurrence of galloping.

The proposed NES design is robust and works over a large parameter range.

The NES experiences three successive response modes with increasing flow speed.

The main NES parameters have a significant effect on its behaviour.

Read the full paper here:
Selwanis, M.M., Franzini, G.R., Béguin, C., Gosselin, F.P., 2021. Wind tunnel demonstration of galloping mitigation with a purely nonlinear energy sink. Journal of Fluids and Structures 100, 103169. https://doi.org/10.1016/j.jfluidstructs.2020.103169
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