帽型加筋板热屈曲优化设计

Thermal Buckling Optimization Design of Hat-Stiffened Panel

针对非均匀温度场作用下的帽型加筋板热屈曲问题,采用有限元开展了临界屈曲温度场计算方法研究。在此基础上,结合自动参数化建模方法,建立了以提高受热加筋板屈曲承载能力为目标的优化流程。为了提高优化算法的搜索效率,分别建立了一阶热屈曲特征值和结构重量的代理模型,并将代理模型嵌入到优化流程中,通过代理模型对屈曲特征值和结构重量进行预测来降低优化设计中的有限元计算量,对典型帽型加筋板进行热屈曲分析及优化设计。结果表明,本文中采用的方法可行而且高效,在相关结构设计中具有较大的应用价值。

For the hat-stiffened panel under non-uniform temperature field,a method is advanced to calculate the critical buckling temperature based on Finite Element Method（ FEM）. Then,an optimization procedure with the object to improve the thermal buckling temperature limit is constructed by combining with automatic parametric model construction technique. To promote the search efficiency of this procedure,surrogate models are schemed for first order buckling eigenvalue and structure weight respectively and integrated into the optimization procedure,which is applied to predict the corresponding eigenvalue and weight and to reduce the FEM calculation during structure optimization. The optimization design result of hat-stiffened panel proves that the method in this paper is applicable and effective,thus it will be valuable in the relative structure design.