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Passive vibration control of a satellite boom structure by geometric optimisation using genetic algorithm

Passive vibration control of a satellite boom structure by geometric optimisation using genetic algorithm
Passive vibration control of a satellite boom structure by geometric optimisation using genetic algorithm
In this paper, the superior mid-frequency vibration isolation of a geometrically optimized lightweight structure is demonstrated. The initial structure under test here was a 4.5 m long satellite boom consisting of 10 identical bays with equilateral triangular cross-sections. An unusual geometric variant of this, with inherent isolation characteristics, has been designed by the use of genetic algorithm (GA) methods. In order to obtain the best design, the joints in the boom were allowed to move around by 20% of the length of each bay (i.e., ±9 cm in all three translational directions). This work is based on results from a Fortran code (which was derived from receptance analysis) that are fully validated against detailed finite element (FE) models of the structure. The experimental forced response of the regular boom structure has been measured and compared with predicted curves. Finally, having obtained the geometrically optimized boom structure, its experimental response is compared with the theoretical results predicted by the receptance method. It is shown that the average of 30 dB isolation in the vibration energy transfer between the ends of the network of beams, over a 100 Hz bandwidth predicted in the design process, is achieved experimentally in an essentially undamped structure.
0022-460X
879-892
Moshrefi-Torbati, M.
65b351dc-7c2e-4a9a-83a4-df797973913b
Keane, A.J.
26d7fa33-5415-4910-89d8-fb3620413def
Elliott, S.J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Brennan, M.J.
87c7bca3-a9e5-46aa-9153-34c712355a13
Rogers, E.
611b1de0-c505-472e-a03f-c5294c63bb72
Moshrefi-Torbati, M.
65b351dc-7c2e-4a9a-83a4-df797973913b
Keane, A.J.
26d7fa33-5415-4910-89d8-fb3620413def
Elliott, S.J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Brennan, M.J.
87c7bca3-a9e5-46aa-9153-34c712355a13
Rogers, E.
611b1de0-c505-472e-a03f-c5294c63bb72

Moshrefi-Torbati, M., Keane, A.J., Elliott, S.J., Brennan, M.J. and Rogers, E. (2003) Passive vibration control of a satellite boom structure by geometric optimisation using genetic algorithm. Journal of Sound and Vibration, 267 (4), 879-892. (doi:10.1016/S0022-460X(03)00192-5).

Record type: Article

Abstract

In this paper, the superior mid-frequency vibration isolation of a geometrically optimized lightweight structure is demonstrated. The initial structure under test here was a 4.5 m long satellite boom consisting of 10 identical bays with equilateral triangular cross-sections. An unusual geometric variant of this, with inherent isolation characteristics, has been designed by the use of genetic algorithm (GA) methods. In order to obtain the best design, the joints in the boom were allowed to move around by 20% of the length of each bay (i.e., ±9 cm in all three translational directions). This work is based on results from a Fortran code (which was derived from receptance analysis) that are fully validated against detailed finite element (FE) models of the structure. The experimental forced response of the regular boom structure has been measured and compared with predicted curves. Finally, having obtained the geometrically optimized boom structure, its experimental response is compared with the theoretical results predicted by the receptance method. It is shown that the average of 30 dB isolation in the vibration energy transfer between the ends of the network of beams, over a 100 Hz bandwidth predicted in the design process, is achieved experimentally in an essentially undamped structure.

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e-pub ahead of print date: 23 May 2003
Published date: 30 October 2003
Organisations: Inst. Sound & Vibration Research, Electronics & Computer Science, Computational Engineering & Design Group

Identifiers

Local EPrints ID: 258938
URI: http://eprints.soton.ac.uk/id/eprint/258938
ISSN: 0022-460X
PURE UUID: b6aeb3c5-14b5-441a-a88c-157210482f21
ORCID for E. Rogers: ORCID iD orcid.org/0000-0003-0179-9398

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Date deposited: 02 Mar 2004
Last modified: 17 Dec 2019 02:02

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Contributors

Author: A.J. Keane
Author: S.J. Elliott
Author: M.J. Brennan
Author: E. Rogers ORCID iD

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