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arXiv 2104.04894math.OC
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最优设计与最大Monge-Kantorovich度量

Optimal design versus maximal Monge-Kantorovich metrics

Karol Bołbotowski, Guy Bouchitté

摘要:

最优设计和蒙赫运输之间的显着联系是在1997年开始的最小弹性柔度问题的背景下,其中欧几里德度量成本自然涉及。在本文中,我们提出了不同的变种最优设计的机械结构,特别是集中在最佳预应力弹性薄膜问题。我们发现,相关的度量成本与一个未知的最大单调映射,最大化两个措施之间的Monge-Kantorovich距离。平行于经典的对偶理论导致存在和(在光滑的情况下)PDE最优性条件,我们提出了一个一般的几何方法所产生的两点计划中,测地线相对于最佳度量发挥了核心作用。这两个方面的启发几个明确的例子,也通过数值解,其中最佳的结构往往变成桁架状,即支持分段仿射测地线。在一个离散的负载的情况下,我们能够将这种桁架式的解决方案的存在性的最大单调映射的扩展属性,这是独立的利益,我们在这里提出的一个猜想。

英文摘要:

A remarkable connection between optimal design and Monge transport was initiated in the years 1997 in the context of the minimal elastic compliance problem and where the euclidean metric cost was naturally involved. In this paper we present different variants in optimal design of mechanical structures, in particular focusing on the optimal pre-stressed elastic membrane problem. We show that the underlying metric cost is associated with an unknown maximal monotone map which maximizes the Monge-Kantorovich distance between two measures. In parallel with the classical duality theory leading to existence and (in a smooth case) to PDE optimality conditions, we present a general geometrical approach arising from a two-point scheme in which geodesics with respect to the optimal metric play a central role. These two aspects are enlightened by several explicit examples and also by numerical solutions in which optimal structures very often turn out to be truss-like i.e supported by piecewise affine geodesics. In case of a discrete load, we are able to relate the existence of such truss-like solutions to an extension property of maximal monotone maps which is of independent interest and that we propose here as a conjecture.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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