Shock wave filtering of two-dimensional CFRP X-lattice structures: A numerical investigation
Shock wave filtering of two-dimensional CFRP X-lattice structures: A numerical investigation
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DOI：
10.1016/j.compstruct.2021.113743
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发表时间：
2021-03-06
影响因子：
6.3
通讯作者：
Yokozeki, Tomohiro
中科院分区：
文献类型：
--
作者：
Iwata, Yoshimasa;Yokozeki, Tomohiro
复合X型晶格结构由周期性图案的波纹碳纤维增强塑料肋组成，被认为是一种卓越的轻质航空航天结构。由于二维周期性结构的频率和空间滤波特性，预计它会表现出良好的波衰减特性。引入使用二维周期结构理论和有限元方法（FEM）的波传播分析，以较少的计算资源对波滤波特性进行数值评估。通过将使用周期性获得的结果与全尺寸有限元模拟的频率响应进行比较，验证了这些结果。通过改变晶格结构的几何特性来呈现滤波特性的范围。通过结合几种具有不同滤波特性的晶格结构，提出了一种设计具有更广泛和理想的滤波特性的复合晶格结构的方法。
A composite X-lattice structure, comprising corrugated carbon-fiber-reinforced plastic ribs in a periodic pattern, is considered a superior light-weight aerospace structure. It is expected to exhibit good wave attenuation properties owing to the frequency and spatial filtering characteristics of a two-dimensional periodic structure. Wave propagation analysis using the theory of a two-dimensional periodic structure and finite element method (FEM) was introduced to numerically evaluate the wave filtering properties with fewer computational resources. The results obtained using the periodicity were validated by comparing them with the frequency responses of the full-scale FEM simulation. The range of the wave filtering properties was presented by changing the geometrical properties of the lattice structure. An approach to design a composite lattice structure with broader and desirable wave filtering properties was proposed by combining several types of lattice structures with different wave filtering properties.