论文分享 samcef复合材料优化 线性与非线性有限元分析

论文分享 samcef复合材料优化 线性与非线性有限元分析

论文题目：EXPLOITING SEMIANALYTICAL SENSITIVITIES FROM LINEAR AND NONLINEAR FINITE ELEMENT ANALYSES FOR COMPOSITE PANEL OPTIMIZATION

论文介绍了基于samcef的飞机机身复合材料层压板的高级优化设计方法。文章的主要内容如下：

This paper presents a solution procedure developed in the SAMCEF ¯nite element code for the advanced optimal design of sti®ened composite panels of an aircraft fuselage. The BOSS Quattro, a task manager and optimization toolbox, is used for de¯ning and running the optimization problem. The objective function to be minimized is the weight, and the restrictions depend on structural stability requirements, such as buckling and collapse. The design variables are the panel and stringer thicknesses of the conventional proportions (i.e. 0_; 90_ and _45_) in a homogenized laminate. Since a collapse analysis introduces geometric nonlinearities into the design process, the function evaluation can take a long time. In order to obtain a rapid optimal solution, a gradient-based method is used, and the ¯rst order derivatives need to be computed, in this case with an original semianalytical approach. The sensitivity analysis of buckling and collapse is reviewed. Numerical tests on an industrial case study demonstrate the possibility and the reliability of the approach. Solving such problems is clearly di±cult and remains a challenge. Through the applications, this paper provides the opportunity to discuss convergence issues and the use of such advanced optimization techniques in the overall aircraft design process.

 

GenPurpSoft-SMecComp_2010_07_en.pdf