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Change of the natural frequencies with nonideal α or β values.
| Natural frequencies (Hz) | β = 1 | α = 1 | ||||
|---|---|---|---|---|---|---|
|
|
|
|||||
| α = 0.98 | α = 0.95 | α = 0.90 | β = 0.98 | β = 0.95 | β = 0.90 | |
| f1 | 1708.4 | 1720.2 | 1738.1 | 1693.6 | 1683.0 | 1662.4 |
| f2 | 2010.5 | 2027.9 | 2062.1 | 1990.2 | 1976.0 | 1954.0 |
| Δf1 = |f1−fd| | 91.6 | 79.8 | 61.9 | 106.4 | 117.0 | 137.6 |
| Δf2 = |f2−fd| | 210.5 | 227.9 | 262.1 | 190.2 | 176.0 | 154.0 |
