論文分享 samcef復合材料優(yōu)化 線性與非線性有限元分析

論文題目：EXPLOITING SEMIANALYTICAL SENSITIVITIES FROM LINEAR AND NONLINEAR FINITE ELEMENT ANALYSES FOR COMPOSITE PANEL OPTIMIZATION

論文介紹了基于samcef的飛機機身復合材料層壓板的高級優(yōu)化設計方法。文章的主要內(nèi)容如下：

This paper presents a solution procedure developed in the SAMCEF ˉnite 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 deˉning 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 ˉrst 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