薄板热力耦合的屈曲分析

李若愚; 王天宏

doi:10.21656/1000-0887.400308

薄板热力耦合的屈曲分析

doi: 10.21656/1000-0887.400308

李若愚¹,
王天宏²

¹上海飞机设计研究院, 上海 201210;²西北工业大学航空学院, 西安 710072

详细信息

作者简介:
李若愚（1994—），男，博士生（通讯作者. E-mail: 412364086@qq.com）；王天宏（1968—），男，教授，博士.

中图分类号: O343.9
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- 被引次数: 0
出版历程
- 收稿日期: 2019-10-14
- 修回日期: 2020-01-05
- 刊出日期: 2020-08-01

Thermo-Mechanical Buckling Analysis of Thin Plates

LI Ruoyu¹,
WANG Tianhong²

¹Shanghai Aircraft Design and Research Institute,Shanghai 201210, P.R.China;²School of Aeronautics Northwestern Polytechnical University,Xi’an 710072, P.R.China

摘要

摘要: 基于Rayleigh-Ritz理论，采用有限元方法，推导了薄板在热力耦合载荷作用下屈曲临界载荷的表达式.假设力载荷与热载荷同时加载，采用MATLAB编译环境编写的有限元程序求解薄板结构在热力耦合载荷作用下的屈曲临界载荷.在做屈曲分析时，热载荷以温度场的形式施加到节点上.采用非均匀温度场加载，分析力载荷分量与热载荷分量对薄板结构失稳的影响.研究结果表明随着给定温度载荷、力载荷的增加或者降低，临界载荷随之增加或者降低，它们几乎呈线性变化.
- 热力耦合 /
- 屈曲 /
- 有限元 /
- 薄板
Abstract: Based on the RayleighRitz theory and the finite element method, the expressions of critical buckling loads on thin plates under thermomechanical coupling loads was derived. Under simultaneously imposed mechanical and thermal loads, the finite element program was compiled in the MATLAB environment to solve the buckling critical loads on thin plates. In the buckling analysis, the thermal load was applied at the nodes in the form of temperature field. The effects of mechanical load components and thermal load components on the instability of thin plates were analyzed through nonuniform temperature field loading. The results show that, with the increase or decrease of given thermomechanical loads, the critical load increases or decreases almost linearly.
- thermo-mechanical coupling /
- buckling /
- finite element method /
- thin plate

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参考文献(15)

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