Volume 38, Number 1, February 2020
|40 - 47
|12 May 2020
Stability Analysis of Different Stiffened Plates in Thermal-Mechanical Coupling Environments
School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China
2 Aircraft Strength Research Institute, Xi'an 710072, China
In view of the structural stability problem of different typical stiffened panels under different loading conditions, ABAQUS software was used to build finite element models of four typical stiffened panels with the same cross section area. The buckling and post-buckling response of the stiffened panels was analyzed and buckling modes and deflection curves of stiffened panels under mechanical, temperature and thermal-mechanical coupling load were obtained. The result indicates that T type stiffened plate shows great stability under mechanical load, the maximum load is 281KN, which is much higher than that of other types of stiffened panels. The maximum load of a stiffened panel is little affected by the direction of the fillet, but reasonable layout of panels can greatly reduce the out-of-plane displacement of the stiffened panel. There is no obvious pre-buckling process when a panel is under thermal-mechanical coupling load and the post-buckling response is roughly similar as that under mechanical load. But the maximum load of a stiffened plate will decrease by 8%-15% due to the application of temperature load.
Key words: thermal-mechanical coupling / stiffened plates / stability analysis / Abaqus / nonlinear buckling
关键字 : 热力耦合 / 加筋壁板 / 稳定性分析 / Abaqus / 非线性屈曲
© 2020 Journal of Northwestern Polytechnical University. All rights reserved.
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