Structural design and control of modular tensegrity structures

Amouri, Sarah Badra; Averseng, Julien; Quirant, Jérôme; Dubé, Jean‐François

doi:10.1080/19648189.2014.965849

Cited by 10 publications

(7 citation statements)

References 28 publications

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“…Among the benefits of tensegrity, we can mention its potential for the realization of smart, adaptive [15,16,17,18] and foldable structures [19,20,21], for which origami art can be a source of inspiration [22]. The stiffness and stability of a tensegrity structure depend both on the mechanical and geometrical properties of the elements, as well as their self-stress [23,24], locally or globally distributed inside the structure. The self-stress design is carried out using form-finding methods [25,26].…”

Section: Structural Conceptmentioning

confidence: 99%

Deployable double layer tensegrity grid platforms for sea accessibility

Hrazmi¹,

Averseng²,

Quirant³

et al. 2021

Engineering Structures

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Tensegrity systems are a class of reticulated space structures composed of compressed bars maintained in equilibrium by a network of tensioned cables. Their stiffness depends both on elements' mechanical properties and their internal selfstress state. Taking advantage of their structural properties, we respond to the challenge of accessibility for everybody to the sea with a new concept of modular lightweight and deployable platforms. Variable configurations are developed to fit ecologically into the marine environment thanks to the transparency of double layer tensegrity structures. Moreover, allowing practical assembly and disassembly is considered in the design to respect the coastal law. Through a numerical study, we demonstrate in this paper the capability of this solution under various representative load cases and support conditions.After the structural and design optimization of elements constrained by weight and stiffness, we detail the design of the nodes, which are the key components ensuring geometry and foldability of the structure. Finally, on-site setting and interfacing with ground supports is experimented in marine conditions to proof the feasibility of this concept.

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Section: Structural Conceptmentioning

confidence: 99%

Deployable double layer tensegrity grid platforms for sea accessibility

Hrazmi¹,

Averseng²,

Quirant³

et al. 2021

Engineering Structures

Self Cite

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“…The optimal tensegrity beam maximizing their performances indicator (defined as the inverse of the product of the deflection and the mass) showed high deflection (L=130) and important mass compared with traditional beams. Amouri et al (2015) improved their algorithm and presented three curved tensegrity beams with three different geometries and various materials [Fig. 3(b)].…”

Section: State Of the Art And Objectivesmentioning

confidence: 99%

Optimization of Footbridges Composed of Prismatic Tensegrity Modules

Feron

Boucher

Denoël³

et al. 2019

J. Bridge Eng.

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The architectural potential of tensegrity structures is proven. Yet, paradoxically, very few real construction projects have been built around the world. The main reasons are complex construction processes, lack of design and optimization guidelines, and excessive self-weight due to the prestress needed to guarantee stiffness and dynamic behavior. Hence, optimizing the stiffness and self-weight is a key aspect when designing a tensegrity footbridge. Previous research has demonstrated the validity of a design and optimization methodology, based on morphological indicators, that identifies geometry with a maximum stiffness and=or a minimum self-weight for a family of structures. In this paper, that methodology is applied to footbridges composed of tensegrity modules comprising simplex, quadruplex, pentaplex, and hexaplex types. A comparison of the stiffest and lightest structures is provided, a practical case study is developed, and the relevance and feasibility of such tensegrity footbridges are discussed. As a result, the study provides advice on optimum footbridge topologies with the following characteristics: excellent stiffness and dynamic behavior; efficient structures composed of simplex modules; and self-weight that is still rather high but similar to that of bended structures, although with potential to be reduced thanks to optimization of the prestress scenario.

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“…A dynamic model of the simplex as a system of single-degree-of-freedom subjected to rotation about its vertical axis was discussed in [17]. An active controlled tensegrity was analyzed dynamically in [18], which was a part of a Tensarch project [19]. A solution to attenuate the first natural frequency in order to diminish the response of the analyzed structure was proposed.…”

Section: Introductionmentioning

confidence: 99%

Response of a Tensegrity Simplex in Experimental Tests of a Modal Hammer at Different Self-Stress Levels

Małyszko¹,

Rutkiewicz²

2020

Applied Sciences

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The natural frequencies and eigenmodes of the tensegrity simplex are determined experimentally in impact hammer tests. To study an effect of prestressing, the tests are carried out on a physical model 1.2 m high and 0.5 m diameter with build-in transducers for measuring actual values of forces in cables at 13 prestress levels. The recorded data for each pre-stress level from three three-axial accelerometers are combined to extract the first five natural frequencies and modes by means of the method of experimental modal analysis. It was experimentally confirmed that the first rotational frequency depends on the pre-stress level and its sensitivity to the self-stress state is high enough to be successfully used in vibrational health monitoring. A proprietary formula was proposed for the relationship between frequency and the pre-stress level to control the dynamic properties of the simplex. An excellent comparison between the experimental results of the frequency and the formula was obtained. A comparison of numerical results of the finite element method with truss element and experiment is also shown.

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Structural design and control of modular tensegrity structures

Cited by 10 publications

References 28 publications

Deployable double layer tensegrity grid platforms for sea accessibility

Deployable double layer tensegrity grid platforms for sea accessibility

Optimization of Footbridges Composed of Prismatic Tensegrity Modules

Response of a Tensegrity Simplex in Experimental Tests of a Modal Hammer at Different Self-Stress Levels

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