Suppressing Flow-Induced Vibrations by Parametric Excitation |
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Authors: | Fatimah S. Verhulst F. |
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Affiliation: | (1) Mathematical Institute, University of Utrecht, P.O. Box 80010, 3508 TA Utrecht, The Netherlands |
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Abstract: | The possibility of suppressing self-excited vibrations of mechanicalsystems using parametric excitation is discussed. We consider a two-masssystem of which the main mass is excited by a flow-induced, self excitedforce. A single mass which acts as a dynamic absorber is attached to themain mass and, by varying the stiffness between the main mass and theabsorber mass, represents a parametric excitation. It turns out that forcertain parameter ranges full vibration cancellation is possible. Usingthe averaging method the fully non-linear system is investigatedproducing as non-trivial solutions stable periodic solutions and tori.In the case of a small absorber mass we have to carry out a second-ordercalculation. |
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Keywords: | flow-induced parametric excitation absorber |
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