Study on the Influence of Temperature Boundary Conditions on the Buckling Phenomenon of Panels
High-speed aircraft represented by hypersonic aircraft is prone to buckling instability of the panel structure during flight,which is closely related to the thermal effect,thus the temperature boundary conditions will have an impact on the buckling behavior of the structure.In this paper,the influence of different temperature boundary conditions on the buckling behavior of the panel was studied by a set of self-designed test fixture and the static arc length algorithm based on the thermal sequential coupling method.The results show that the boundary temperature significantly affects the ultimate buckling load,and the degree of influence is related to the mechanical boundary conditions;when there is a negative temperature difference between the boundary and the domain(the boundary temperature is lower than the domain temperature),the sensitivity of the temperature effect is higher;in contrast,the width of the boundary temperature affected zone has little effect on the buckling behavior of the panel.This study can provide some reference basis for the in-depth study of thermal buckling behavior of complex panel structure.
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