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Mesoscale structure of periodic textile composites effect on wave propagation

机译:中尺度结构的周期纺织复合材料对波传播的影响

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In this article, a method for wave propagation analysis of textile composites at a mesoscopic level is presented for the first time. This study is performed in the vibro-acoustic and ultrasonic frequency ranges. The presented method combines a mode-based reduction method, allowing for great CPU cost saving, and the Wave Finite Element Method (WFEM), which associates the Periodic Structure Theory (PST) and standard Finite Element Method (FEM). The PST allows to analyse the wave propagation properties of a periodic structure by modelling only a periodicity (unit cell) of it. A standard wave propagation analysis of textile composite structures is also performed, using homogenized properties in the unit cell, and used as a comparison. It is shown for different types of textiles that using the standard method results in errors in the dispersion curves.
机译:在本文中,首次呈现了介绍介质水平的纺织复合材料的波传播分析方法。该研究在振动声和超声波频率范围内进行。呈现的方法结合了基于模式的还原方法,允许众多CPU成本节省,以及波动有限元方法(WFEM),其将周期性结构理论(PST)和标准有限元方法(FEM)相关联。 PST允许通过仅建模其的周期性(单位单元)来分析周期性结构的波传播特性。还使用单元电池中的均质性质进行纺织复合结构的标准波传播分析,并用作比较。它显示出不同类型的纺织品,使用标准方法导致色散曲线中的误差。

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