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首页> 外文期刊>International Journal of Heat and Mass Transfer >Combined 'heat flow and strength' optimization of geometry: mechanical structures most resistant to thermal attack
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Combined 'heat flow and strength' optimization of geometry: mechanical structures most resistant to thermal attack

机译：结合了“热流和强度”的几何优化：机械结构最能抵抗热侵害

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This paper outlines a new direction for fundamental heat transfer: a multidisciplinary approach (combined heat transfer and strength of materials) in the conceptual design of structures that have two functions, mechanical strength and resistance (survival) in the presence of sudden thermal attack. The two functions are considered simultaneously, from the start of conceptual design. This is unlike traditional approaches, where structures are optimized for mechanical strength alone, or for thermal resistance alone. In the first part of the paper, the profile of a beam loaded in bending is optimized by maximizing the lifetime in the presence of sudden heating. The propagation of the heat wave through the beam causes softening, because of the gradual transition from elastic behavior to thermoplastic behavior. In the second part of the paper, the subject is a beam of concrete reinforced with steel bars. It is shown that the clash between the mechanical and thermal objectives of the beam generates the shape of the beam cross-section, and the position of the steel bars in the beam cross-section. The generation of optimal architecture for maximal global performance under global constraints in freely morphing systems is constructal design. On the background of the con-structal architectures that have been developed so far, the present paper outlines the first steps toward the constructal design of multiobjective (multidisciplinary) architectures.
机译：本文概述了基本传热的新方向：结构的概念设计中的多学科方法（结合了传热和材料强度），具有两种功能，即在突然发生热冲击的情况下具有机械强度和抵抗力（生存性）。从概念设计开始，就同时考虑了这两个功能。这与传统方法不同，在传统方法中，仅针对机械强度或仅针对热阻对结构进行了优化。在本文的第一部分中，在突然加热的情况下，通过使寿命最大化来优化弯曲时加载的梁的轮廓。由于从弹性行为到热塑性行为的逐步过渡，热波通过梁的传播会导致软化。在本文的第二部分，主题是用钢筋加固的混凝土梁。结果表明，梁的机械和热物镜之间的碰撞产生了梁横截面的形状，以及钢筋在梁横截面中的位置。在自由变形系统中，在全局约束下产生最佳全局性能的最佳体系结构的生成是结构设计。在到目前为止已开发的结构体系结构的背景下，本文概述了朝着多目标（多学科）体系结构的结构设计的第一步。

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