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Damping ratio for excitation amplitude 1g_
| Object | Mode | ||||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | ||
| Solid Blade | ζ [Hz] | 0.16 | 0.28 | 0.11 | 0.06 |
| Lattice Blade | ζ [Hz] | 0.86 | 0.53 | 0.29 | 0.72 |
| Damping increase | 5.4× | 1.9× | 2.6× | 12× | |
Natural frequencies of the blades obtained from experimental testing_
| Object | Mode | ||||
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | ||
| Solid Blade | f [Hz] | 1076 | 2529 | 3745 | 4928 |
| Lattice Blade | f [Hz] | 1019 | 2293 | 3357 | 4463 |
| Relative Difference | −5% | −9% | −10% | −9% | |