Computation tools for the design of a deployable dome structure

Lee, Daniel Sang-Hoon; Larsen, Olga Popovic; Kim, Seung-Deog

doi:10.1201/b20891-34

Cited by 6 publications

(6 citation statements)

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“…Because of the large displacements and rotations and the bistability, the transformation behaviour of bistable scissor structures, first studied computationally by Gantes [11], is highly non-linear. By though analysing bistable scissor structures is a contemporary research topic [12][13][14][15][16][17][18][19], existing applications in civil engineering are rare, largely due to this complex structural behaviour.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimisation of deployable bistable scissor structures

Arnouts

Massart

Temmerman

et al. 2020

Automation in Construction

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Lightweight bistable deployable structures can be designed to be transportable and reusable. They instantaneously achieve some structural stability when transformed from the compact to the deployed state through a controlled snapthrough, as a result of intended geometric incompatibilities between the beams. Due to their transformable bistable nature their design requires assessing both their non-linear transformation behaviour, as well as their service state in the deployed configuration. The requirement of a low peak force during transformation can be shown to oppose the high stiffness requirement in the deployed state; their design can therefore be formulated as a multi-objective nonlinear optimisation problem. In this contribution, a size and shape optimisation method is elaborated by choosing the best material combinations, the optimal geometry of the structure and beam cross-sections. The originality of this contribution is the use of a multi-objective evolutionary algorithm to structurally optimise bistable scissor structures taking into account the deployed state as well as the transformation phase. First, the method is applied to optimise a single bistable scissor module. Next, a multi-module bistable scissor structure is optimised and the single module and full structure based approaches are critically compared.

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Section: Introductionmentioning

confidence: 99%

Multi-objective optimisation of deployable bistable scissor structures

Arnouts

Massart

Temmerman

et al. 2020

Automation in Construction

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“…However, it was disregarded that when a structure is folded, the joints can prevent the SLE's to close on a straight line. Developing and analysing bistable scissor structures is still a contemporary research subject in civil engineering, as can be seen from the large number of recent contributions [1,[15][16][17][18][19][20][21], without aiming for exhaustivity.…”

Section: Introductionmentioning

confidence: 99%

“…Extra measures should be taken when semiregular polyhedra are used because it is important to make sure that Eq. (15) -(18) are satisfied for every module. If not, the hub size should be increased.…”

mentioning

confidence: 97%

Geometric design of triangulated bistable scissor structures taking into account finite hub size

Arnouts

Temmerman

Massart

et al. 2020

International Journal of Solids and Structures

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Pre-assembled scissor structures can be transformed from a compact bundle of elements to a fully deployed configuration, offering a considerable volume expansion. Intended geometrical incompatibilities during transformation can be introduced as a design strategy to obtain bistability, which allows instantaneously achieving some structural stability in the deployed state. Because of these incompatibilities, some specific members bend during transformation, resulting in a controlled potentially tunable snap-through behaviour. Geometric design methodologies were proposed in the literature to obtain a compatible geometry (i.e. with all of the beams straight) in the folded and the deployed configurations. However, most of these approaches do not consider finite hub sizes or introduce extra incompatibilities in the geometry by adding hub legs. In this contribution, deployability conditions are derived taking the finite hub size, i.e. the spacing between the connections of the different beams to the hub, into account to make triangulated bistable scissor modules fully geometrically compatible in the folded and the deployed configuration.

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“…In the past, most design approaches were heavily simplified for the ease of application. Today, the continuously improving computer technology and advanced numerical methods allow for dealing with highly complex problems [14], making the use of computational tools efficient and indispensable as part of the design process.…”

Section: Introductionmentioning

confidence: 99%