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A MATHEMATICAL PROGRAMMING METHOD FOR THE TOPOLOGY OPTIMIZATION OF A TRUSS-LIKE CONTINUUM

机译:桁架状连续体拓扑优化的数学规划方法

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摘要

A mathematical programming method to optimize the distribution field of a truss-like material is presented. The densities and angles of members are optimized in two separate procedures in each iteration. An explicit sub-problem in a variable separation form is established at every iteration procedure. At each sub-problem, the stress constraint function is expanded into a trigonometric series of the member angles. According to the extreme condition, the optimal orientations of members are determined. The member densities are optimized using the method of moving asymptotes (MMA). Two examples demonstrate that the optimal truss-like structures are very close to analytic solutions.
机译:提出了优化桁架状材料分布场的数学程序设计方法。在每次迭代中,通过两个单独的过程优化了构件的密度和角度。在每个迭代过程中,都会建立一个以变量分离形式存在的显式子问题。在每个子问题上,应力约束函数都扩展为成员角的三角级数。根据极端条件,确定构件的最佳方向。使用移动渐近线(MMA)的方法来优化成员密度。两个例子表明,最佳的桁架状结构非常接近解析解。

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