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A study of joint damping in metal plates

Walker, SJI, Aglietti, GS and Cunningham, P (2009) A study of joint damping in metal plates Acta Astronautica, 65 (1-2). pp. 184-191.

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For satellite applications the determination of the correct dynamic behaviour and in particular the structural damping is important to assess the vibration environment for the spacecraft subsystems and ultimately their capability to withstand the launch vibration environment. Therefore, the object of this investigation is to experimentally analyse a range of aluminium panel configurations to study the effect of joints on the damping of the complete structure. The paper begins with a full description of the experimental method used to accurately determine the modal loss factors for each of the panel configurations analysed. Nine different panels were used in the experimental tests, six of which incorporate lap joints variations. The joint parameters investigated include fastener type, bolt torque, fastener spacing, overlap distance and the effect of stiffeners. The damping results of ten different joint variants are presented for each of the first twelve modes of vibration. This data is directly compared to the damping factors of an equivalent monolithic panel. Various specific conclusions are made with respect to each of the joint parameters investigated. However, the primary conclusion is that the mode shape combined with the joint stiffness and joint location can be suggestive as to the likely magnitude increase of the modal loss factor. © 2009 Elsevier Ltd.

Item Type: Article
Divisions : Surrey research (other units)
Authors : Walker, SJI, Aglietti, GS and Cunningham, P
Date : 1 July 2009
DOI : 10.1016/j.actaastro.2009.01.017
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 15:54
Last Modified : 24 Jan 2020 12:57

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