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Title: Damping device through autoparametric effect
Authors: Hui, CK
Ng, CF
Issue Date: Dec-2011
Source: Dynamics for sustainable engineering : proceedings of the 14th Asia-Pacific Vibration Conference, 5-8 December 2011, Hong Kong, v. 2, p. 683-690
Abstract: This paper presents a new design of nonlinear dynamic absorber (NDA) using the phenomenon of autoparametric interaction between the first symmetric mode and the first anti-symmetric mode of a curved beam to reduce the resonance vibration of a primary structure with a controllable operational frequency range. For a typical autoparametric theory of a curved beam, the lowest excitation force required to initiate an energy transfer from the first symmetric mode (q₁) to the first anti-symmetric mode (q₂) involves tuning the ratio of the resonance frequencies of the first symmetric mode (ω₁) and first anti-symmetric mode (ω₂) to close 2. The resonance frequency of the first anti-symmetric mode (ω₂) can be altered to control the operational frequency range. The autoparametric vibration response can be used to create an energy-dissipative region to achieve a controllable bandwidth. It is also possible to create a non-dissipative frequency region in between two dissipative frequency regions. This is useful for providing damping with a conventional mass damper. Numerical calculations indicate that the resonance vibration of a primary structure can be successfully reduced using this approach.
Keywords: Nonlinear
Publisher: Department of Civil and Structural Engineering and Department of Mechanical Engineering, The Hong Kong Polytechnic University.
ISBN: 978-962-367-732-5
Rights: Copyright ©2011 Department of Civil and Structural Engineering and Department of Mechanical Engineering, Hong Kong Polytechnic University
Posted with permission of the publisher.
Appears in Collections:Conference Paper

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