Stability performance of stiffening rings on large CFRP thin⁃walled tube trusses

Xiang MI; Wujun CHEN; Yibei ZHANG; Shiping LI; Xiaohui HUANG

doi:10.7527/S1000-6893.2022.27738

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2023 , Vol. 44 >Issue 12: 227738 - 227738

DOI: https://doi.org/10.7527/S1000-6893.2022.27738

Solid Mechanics and Vehicle Conceptual Design

Stability performance of stiffening rings on large CFRP thin⁃walled tube trusses

Xiang MI ,
Wujun CHEN ,
Yibei ZHANG ,
Shiping LI ,
Xiaohui HUANG

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^1.Space Structures Research Centre，Shanghai Jiao Tong University，Shanghai 200240，China
^2.New United Group Co. ，Ltd. ，Changzhou 213166，China

E-mail： cwj@sjtu.edu.cn

Received date: 2021-06-30

Revised date: 2021-07-28

Accepted date: 2021-08-29

Online published: 2022-09-13

Supported by

Key Research and Development Program of the Ministry of Science and Technology(2016YFB1200200)

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Abstract

To further study the stability performance of the CFRP thin-walled tube truss stiffening ring， the key structural component of a semi-rigid stratospheric airship， the eigenvalue buckling analysis of the initial configuration and the configuration with different tension displacements is carried out. Then， considering the initial prestress and initial geometric imperfections， we examine the nonlinear stability of the whole process of the pre-tensioning condition and the stability of the configuration with different tension displacements using the temperature load. Finally， the initial geometric imperfections are analyzed through calculation. The research shows that the local buckling occurs first； the structure is sensitive to the initial geometric imperfections， and the critical buckling load of the structure is reduced by 42.91% after considering the initial geometric imperfections. The critical buckling load factor of the structure decreases linearly with the increase of initial prestress and tension displacement， and the ratio of the maximum stress of the upper and lower radial cables to their heights exhibits the same trend. The internal force distribution of radial cables is closely related to the form of geometric imperfections during structural buckling， and the multi-model combined imperfections can better reflect the real geometric imperfections of the structure. This paper has important reference value for the design， assembly and integration of CFRP thin-walled tube stiffening rings and similar spoke tension structures.

Key words： CFRP thin-walled tube truss; stiffening ring; eigenvalue buckling; nonlinear buckling; geometric imperfection analysis

Cite this article

Xiang MI , Wujun CHEN , Yibei ZHANG , Shiping LI , Xiaohui HUANG . Stability performance of stiffening rings on large CFRP thin⁃walled tube trusses[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023 , 44(12) : 227738 -227738 . DOI: 10.7527/S1000-6893.2022.27738

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