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Stiffness of three-bar tensegrity structure

Ani Luo (College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, China)
Ziying Cao (College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, China)
Heping Liu (College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, China)
Yaming Feng (College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin, China)

Engineering Computations

ISSN: 0264-4401

Article publication date: 1 June 2023

Issue publication date: 15 June 2023

362

Abstract

Purpose

In this paper, the main factors influencing the structure stiffness will be analyzed by studying the tangent stiffness matrix based on different requirement in engineering practice. The authors can obtain the deformation of three-bar tensegrity basic unit in different load, and gain the primary factor by comparing the deformation, which will provide reference to concrete structure design in the engineering.

Design/methodology/approach

The mathematical model of tensegrity structure was built by establishing generalized node coordinates and connective matrix. Three main factors that affect the structure deformation can be obtained by analyzing the stiffness matrix, which is preload, Young's modulus, and cross-sectional area, the thinking of deformation also be sorted out. The deformation analysis of the concrete structure is carried out, and it is concluded that increasing the cross-sectional area can quickly improve the stiffness of the structure, which provides a reference for the structural variable stiffness design in practical engineering.

Findings

(1) When the axial external force is applied to the structure, the torsion-angle deformation of the structure is the largest, and the radial deformation of the structure is the smallest. (2) The structure stiffness can be rapidly enhanced by increasing the cross-sectional area. But the cross-sectional area can't be increased indefinitely. Because the mass will be increased once increasing the cross-sectional area, which will destroy the structure of the advantages of light weight in engineering practice.

Originality/value

The deformation analysis of the concrete structure is carried out, and it is concluded that increasing the cross-sectional area can quickly improve the stiffness of the structure, which provides a reference for the structural variable stiffness design in practical engineering.

Keywords

Acknowledgements

This work was supported by the National Natural Science Foundation of China (NSFC) [grant numbers 51835002, 51875111].

Citation

Luo, A., Cao, Z., Liu, H. and Feng, Y. (2023), "Stiffness of three-bar tensegrity structure", Engineering Computations, Vol. 40 No. 4, pp. 823-835. https://doi.org/10.1108/EC-10-2022-0642

Publisher

:

Emerald Publishing Limited

Copyright © 2023, Emerald Publishing Limited

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