Modal analysis of a bistable deployable module with a refined joint model

• Published in: Engineering structures Vol. 269; p. 114798
• Main Authors: Santana, M.V.B., Hjiaj, M., Berke, P.Z.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 15.10.2022; Elsevier BV; Elsevier
• Subjects: Bistable deployable structures; Civil engineering; Computer applications; Design; Design parameters; Engineering Sciences; Manufacturing; Mathematical models; Modal analysis; Modules; Parameter identification; Resonant frequencies; Stiffness; Stochasticity; Structural dynamics; Structural joints; Vibration; Vibration mode; Bistable deployable structures; Structural dynamics; Structural joints; Modal analysis
• ISSN: 0141-0296; 1873-7323
• DOI: 10.1016/j.engstruct.2022.114798

Bistable deployable scissor structures (BDS) are interesting solutions for temporary civil engineering structures having the requirement of rapid erection and use. The transformation and design of BDS have been studied in various works in the literature using numerical simulations based on a quasi-static loading assumption. In contrast, their dynamic behavior and factors influencing it have not yet been extensively investigated. This contribution presents a computational study in which the natural frequencies and vibration modes of a single square BDS module are evaluated, incorporating the effects of the variation of particular design parameters specific to BDS, i.e. the materials used for inner and outer scissors, finite joint stiffness and manufacturing imperfections on the member lengths (in a stochastic approach) and two geometrical parameters of the module. The most dominant parameters are identified, and their effect is quantified, yielding results of practical interest for design and manufacturing that can be used to reach a target dynamic behavior of BDS. •Assess of the behavior of a bistable deployable module through modal analysis.•Study of the main parameters having a critical influence on the modal behavior.•Influence of the finite joint stiffness and member length on the dynamic behavior.