STRUCTURAL DAMPERS

Example assumptions:​

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• Applied harmonic wind force:

1. The amplitude corresponds to a wind speed of 10 m/s, based on recorded data from similar wind turbines.

2. The frequency matches the natural frequency of the wind turbine​.

• The chosen device stiffness setting reduces the wind turbine’s lateral stiffness by 35%.

• Assumed inherent damping ratio: 3%

• Adjacent graph:  wind-induced steady state lateral displacements at the top blade tip with & without Struflex dampers.

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Comparison:

StruFlex (base) dampers - VS - ​​nacelle-mounted mass dampers​

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StruFlex dampers are x2.5 more effective than a nacelle-mounted, very heavy mass damper with a 5% mass ratio, and several times more effective than commonly used mass dampers with 1–2% mass ratios.