Research Article
Unsteady Analyses of a Control Valve due to Fluid-Structure Coupling
Table 1
Natural frequencies of the plug assembly of the control valve.
| | Valve opening | Order | Natural frequency without
coupling (Hz) | Natural frequency with
coupling (Hz) | Ratio (%) |
| | 25% | 1 | 89.822 | 79.901 | −11.1 | | 2 | 1158.6 | 1158.4 | 0.0 | | 3 | 3387.1 | 3387.3 | 0.0 | | 4 | 3388.0 | 3388.3 | 0.0 | | 5 | 6221.6 | 6221.3 | 0.0 |
| | 50% | 1 | 107.84 | 100.32 | −7.0 | | 2 | 1347.5 | 1347.8 | 0.0 | | 3 | 3979.9 | 3980.1 | 0.0 | | 4 | 3981.7 | 3982.5 | 0.0 | | 5 | 8549.4 | 8552.3 | 0.0 |
| | 75% | 1 | 145.56 | 140.10 | −3.8 | | 2 | 1668.3 | 1669.0 | 0.0 | | 3 | 4375.8 | 4376.0 | 0.0 | | 4 | 4376.7 | 4376.5 | 0.0 | | 5 | 9899.1 | 9899.3 | 0.0 |
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