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arXiv 2004.06942math.OC
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形状最优设计问题建模的连续透视

A continuous perspective on modeling of shape optimal design problems

Johannes Haubner, Martin Siebenborn, Michael Ulbrich

摘要:

本文利用映射方法将形状最优化问题转化为最优控制问题。而不是优化一组容许形状的参考域的介绍,它是一组容许的变换优化。重点是选择的一组转换,我们从函数空间的角度出发。为了保证容许变换的局部内射性,我们通过一个非线性约束来丰富最优化问题。该方法不需要对延拓方程进行参数调整,并且可以自然地与形状的体积和重心的几何约束相结合。给出了Stokes流阻力最小化的数值结果。

英文摘要:

In this article we consider shape optimization problems as optimal control problems via the method of mappings. Instead of optimizing over a set of admissible shapes a reference domain is introduced and it is optimized over a set of admissible transformations. The focus is on the choice of the set of transformations, which we motivate from a function space perspective. In order to guarantee local injectivity of the admissible transformations we enrich the optimization problem by a nonlinear constraint. The approach requires no parameter tuning for the extension equation and can naturally be combined with geometric constraints on volume and barycenter of the shape. Numerical results for drag minimization of Stokes flow are presented.

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