纤维增强复合材料热隐身斗篷设计

发布时间：2018-06-09 01:45

本文选题：热隐身 + 隐身斗篷　；参考：《计算力学学报》2017年04期

【摘要】：基于变换热动力学原理可获得具有热隐身性能的隐身结构(隐身斗篷)所需要的材料性质的空间分布。但这种材料性质的复杂分布形式以及局部热传导性能无限大等极值性质需求,使得隐身斗篷设计的实现非常困难,需要研究基于常规材料的隐身斗篷设计。本文基于常规材料的热隐身结构实现问题,提出了基于纤维增强复合材料圆环结构的实现热隐身的结构形式。首先,基于变换热动力学原理获得热隐身所需的热传导系数沿半径方向的变化规律;进而,通过设计复合材料不同位置的纤维铺设方式(含量和铺设方向)实现热隐身对材料性能的需求。选择金属银作为纤维,空气作为基体,设计出了具有热隐身性能的复合材料圆环结构纤维含量和铺设方向沿径向的分布方案。对该设计方案进行数值仿真,结果显示所设计的隐身结构具有良好的热隐身性能。由于设计方案基于常规材料,因此具有容易实现的优点。
[Abstract]:The spatial distribution of the material properties required for the stealthy structure (cloak) with thermal stealthy properties can be obtained based on the principle of transformation thermodynamics. However, due to the complex distribution of the material properties and the requirement of extreme properties such as the infinite local heat conductivity, the design of the cloak is very difficult, so it is necessary to study the design of the cloak based on conventional materials. Based on the realization of thermal stealthy structure of conventional materials, the structure form of thermal stealthy structure based on fiber reinforced composite ring structure is proposed in this paper. Firstly, based on the principle of transformation thermodynamics, the variation of thermal conductivity along the radius is obtained. By designing the fiber laying mode (content and laying direction) in different position of composite material, the requirement of thermal stealthy for material properties is realized. Using silver metal as fiber and air as matrix, the radial distribution scheme of fiber content and laying direction of composite ring structure with thermal stealthy was designed. Numerical simulation results show that the designed stealthy structure has good thermal stealthy performance. Because the design is based on conventional materials, it has the advantage of easy realization.
【作者单位】：大连理工大学工业装备与结构分析国家重点实验室;
【基金】：国家自然科学基金(11332004) 中航工业产学研合作创兴工程(CXY2013DLLG32)资助项目
【分类号】：TB33;TJ04

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