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Damping of Mechanical Vibrations by Parametric Excitation

Fadi Dohnal

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ISBN 10: 3838103432 / ISBN 13: 9783838103433
Published by Sudwestdeutscher Verlag Fur Hochschulschriften AG
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244 pages. Dimensions: 8.6in. x 5.9in. x 0.6in.The goal of this work is to develop deeper insight into the method of damping vibrations by means of parametric excitation in mechanical systems employing the concept of the so-called parametric anti-resonance. Mechanical systems with simultaneously varying time-periodic stiffness, damping and inertia coefficients are examined. At least two vibration modes are necessary to achieve damping. For these minimum systems a thorough stability analysis is carried out using a perturbation technique. Parametric excitation may lead to a coupling of just two modes of a vibrating system, while the remaining modes are not affected. This coupling enables to transfer energy between modes and its subsequent mitigation. The results demonstrate that parametric excitation can be employed to extend significantly the area of stability in the parameter space of the system parameters. The proposed method shows potential in practical applications when a destabilization due to self-excitation occurs or when the damping of weakly damped systems shall be enhanced. The present book can be used as a comprehensive guide for designing a device for vibration suppression by parametric excitation. This item ships from multiple locations. Your book may arrive from Roseburg,OR, La Vergne,TN. Bookseller Inventory # 9783838103433

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Bibliographic Details

Title: Damping of Mechanical Vibrations by ...

Publisher: Sudwestdeutscher Verlag Fur Hochschulschriften AG

Binding: Paperback

Book Condition:New

Book Type: Paperback

About this title

Synopsis:

The goal of this work is to develop deeper insight into the method of damping vibrations by means of parametric excitation in mechanical systems ? employing the concept of the so-called parametric anti-resonance. Mechanical systems with simultaneously varying time-periodic stiffness, damping and inertia coefficients are examined. At least two vibration modes are necessary to achieve damping. For these minimum systems a thorough stability analysis is carried out using a perturbation technique. Parametric excitation may lead to a coupling of just two modes of a vibrating system, while the remaining modes are not affected. This coupling enables to transfer energy between modes and its subsequent mitigation. The results demonstrate that parametric excitation can be employed to extend significantly the area of stability in the parameter space of the system parameters. The proposed method shows potential in practical applications when a destabilization due to self-excitation occurs or when the damping of weakly damped systems shall be enhanced. The present book can be used as a comprehensive guide for designing a device for vibration suppression by parametric excitation.

About the Author:

Fadi Dohnal, Dr.techn. Dipl.-Ing. Dipl.-Ing.: studied Mechanical Engineering and Applied Physics and received his doctorate at TU Vienna. After working at the Institute of Sound and Vibration Research he joined the TU Darmstadt in 2008. His scientific interests presently cover nonlinear dynamics, rotor and structural dynamics.

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