中文摘要：

针对复合材料层合板的屈曲优化问题,提出一种改进的直接搜索模拟退火算法来求解最大化临界屈曲载荷系数的铺层顺序设计问题。改进算法引入搜索范围动态调整的新点产生方式实现全局搜索和局部搜索的协调,提高了算法的计算稳定性和计算效率。以离散铺层角为设计变量,采用里兹法进行屈曲响应分析以考虑弯扭耦合影响,通过典型多极值屈曲优化问题分析比较了算法改进措施的有效性。不同角度增量、铺层数、长宽比和载荷比的层合板屈曲优化结果表明,改进算法能有效地进行层合板铺层顺序优化。

英文摘要：

An improved direct search SA algorithm was presented to find globally stacking se- quence design of symmetrically composite laminates with maximum buckling load. A new point gener- ation mechanism was introduced into improved SA to enhance the stability and efficiency of the algo- rithm, which the variational search area for generating new point was proposed to realize global and lo- cal search consistent. The design variable was as discrete ply angle and buckling response of laminate was analyzed by Ritz method to consider the bend-twist coupling. A multiple-global optimal problem known was explored to comparative investigate the performance of improved SA. Further, the numeri- cal examples were conducted for different angle increments, layer numbers, aspect ratio and load rati- os,the results show that the presented algrothm is capable to optimize the stacking sequence of com- posite laminates.