温度边界条件对平面壁板热屈曲行为的影响研究  

Study on the Influence of Temperature Boundary Conditions on the Buckling Phenomenon of Panels

作　　者：丁泽航 张天寅 韩先洪[1] Ding Zehang;Zhang Tianyin;Han Xianhong(Shanghai Jiao Tong University,Shanghai 200030,China)

机构地区：[1]上海交通大学,上海200030

出　　处：《航空科学技术》2024年第8期56-63,共8页Aeronautical Science & Technology

基　　金：航空科学基金(20200009057004)。

摘　　要：以高超声速飞行器为代表的高速航空器在飞行过程中其壁板结构易发生屈曲失稳,这种屈曲失稳与热效应紧密相关,因此温度边界条件会对结构的屈曲行为产生影响。本文通过一套自主设计的试验夹具,结合基于热力顺序耦合方式的静力弧长算法,研究了不同温度边界条件对平板屈曲行为的影响。结果表明,边界温度会显著影响极限屈曲载荷,且影响程度与力学边界条件相关;当边界与域内存在负温差(边界温度低于域内温度)时,温度影响的敏感程度更高;相比之下,边界温度影响区的宽度对壁板屈曲行为的影响较小。本文可为复杂壁板结构热屈曲行为的深入研究提供一定的参考依据。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.

关 键 词：平板屈曲 热力耦合边界 弧长法 边界温度 极限屈曲载荷 

分 类 号：V214.3[航空宇航科学与技术—航空宇航推进理论与工程]