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Comparison of passive damping treatments for hollow structures

Comparison of passive damping treatments for hollow structures
Comparison of passive damping treatments for hollow structures
Internal damping of hollow structures, particularly retrospectively, is often difficult and expensive. The nature of the damping material and how it will be used will also be relevant if weight penalties are of significance. It would seem advantageous to establish how effective a damping treatment will be before deciding whether or not to use it. This paper presents an investigation into different methods of applying passive damping treatments to such structures. The merits of three treatments, extensional, constrained-layer, and visco-sphere in-fill damping are discussed. Using the dynamic properties of the viscoelastic damping material, the effect of the individual damping treatments are modelled using MATLAB, for the optimised treatments are applied to the box beam. This allowed for thickness optimisation of the layers of viscoelastic material, particularly for the constrained layer damping. The effectiveness of these treatments in damping the lowest flexural modes present in a steel box beam is investigated using hammer and electromagnetic shaker excitation. These results are then compared with predicted values and each other.
455-467
SPIE - The International Society for Optical Engineering
Pamley, Richard J.
e86f3d51-adac-438b-9777-05b93b2c335e
House, John R.
888c673f-621f-4c62-ab6b-de5e78d545e8
Brennan, Michael J.
87c7bca3-a9e5-46aa-9153-34c712355a13
Inman, Daniel J.
Pamley, Richard J.
e86f3d51-adac-438b-9777-05b93b2c335e
House, John R.
888c673f-621f-4c62-ab6b-de5e78d545e8
Brennan, Michael J.
87c7bca3-a9e5-46aa-9153-34c712355a13
Inman, Daniel J.

Pamley, Richard J., House, John R. and Brennan, Michael J. (2001) Comparison of passive damping treatments for hollow structures. In, Inman, Daniel J. (ed.) Smart Structures and Materials 2001: Damping and Isolation. (Proceedings of SPIE, 4331) Smart Structures and Materials 2001: Damping and Isolation (01/07/01 - 01/07/01) Bellingham, USA. SPIE - The International Society for Optical Engineering, pp. 455-467. (doi:10.1117/12.432729).

Record type: Book Section

Abstract

Internal damping of hollow structures, particularly retrospectively, is often difficult and expensive. The nature of the damping material and how it will be used will also be relevant if weight penalties are of significance. It would seem advantageous to establish how effective a damping treatment will be before deciding whether or not to use it. This paper presents an investigation into different methods of applying passive damping treatments to such structures. The merits of three treatments, extensional, constrained-layer, and visco-sphere in-fill damping are discussed. Using the dynamic properties of the viscoelastic damping material, the effect of the individual damping treatments are modelled using MATLAB, for the optimised treatments are applied to the box beam. This allowed for thickness optimisation of the layers of viscoelastic material, particularly for the constrained layer damping. The effectiveness of these treatments in damping the lowest flexural modes present in a steel box beam is investigated using hammer and electromagnetic shaker excitation. These results are then compared with predicted values and each other.

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More information

Published date: 2001
Venue - Dates: Smart Structures and Materials 2001: Damping and Isolation, Newport Beach, USA, 2001-07-01 - 2001-07-01

Identifiers

Local EPrints ID: 46571
URI: http://eprints.soton.ac.uk/id/eprint/46571
PURE UUID: 513d23cc-72c4-410a-8269-510ca6a98dc9

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Date deposited: 17 Jul 2007
Last modified: 15 Mar 2024 09:24

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Contributors

Author: Richard J. Pamley
Author: John R. House
Author: Michael J. Brennan
Editor: Daniel J. Inman

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