samcef复合材料优化 线性与非线性有限元分析

samtech2012

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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 ANDNONLINEAR 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。文章的摘要如下：

This paper presents asolution procedure developed in the SAMCEF ˉnite element code for the advancedoptimal 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 optimizationproblem. The objective function to be minimized is the weight, and therestrictions depend on structural stability requirements, such as buckling andcollapse. The design variables are the panel and stringer thicknesses of theconventional proportions (i.e. 0_; 90_ and _45_) in a homogenized laminate. Since a collapse analysisintroduces geometric nonlinearities into the design process, the functionevaluation can take a long time. In order to obtain a rapid optimal solution, agradient-based method is used, and the ˉrst order derivatives need to becomputed, in this case with an original semianalytical approach. Thesensitivity analysis of buckling and collapse is reviewed. Numerical tests onan industrial case study demonstrate the possibility and the reliability of theapproach. Solving such problems is clearly di±cult and remains a challenge. Throughthe applications, this paper provides the opportunity to discuss convergenceissues and the use of such advanced optimization techniques in the overallaircraft design process.

samtech2012

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