Acoustic behavior prediction of monodisperse foams using polynomial surrogates

V. Trinh
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Abstract

Acoustic properties of foams, such as macroscopic transports and sound absorption, are significantly influenced by their local morphology. The present paper develops a polynomial chaos expansion (PCE)-based surrogate model for characterizing the microstructure-properties relationships of acoustic monodisperse foams. First, the acoustic properties of the considered structures are estimated numerically by homogenization techniques using an idealized periodic unit cell and the Johnson-Champoux-Allard-Pride-Lafarge (JCAPL) model. The reference maps of transport parameters are then used to construct the PCE–based surrogates in the design space involving a set of foamy microstructural parameters such as membrane content, cell size, and porosity. Finally, after a validation phase and assessing convergence characteristics, the generated surrogates are employed to design some foam-based absorbers to illustrate the accuracy and computational efficiency of the proposed method.
单分散泡沫声学特性的多项式替代预测
泡沫的宏观输运和吸声等声学特性受其局部形貌的显著影响。本文建立了一种基于多项式混沌展开(PCE)的替代模型来表征声单分散泡沫的微观结构-性能关系。首先,通过使用理想周期单元格和Johnson-Champoux-Allard-Pride-Lafarge (JCAPL)模型的均质化技术,对所考虑结构的声学特性进行了数值估计。然后使用传输参数的参考图在设计空间中构建基于pce的替代品,涉及一组泡沫微观结构参数,如膜含量、细胞大小和孔隙率。最后,在验证阶段和收敛特性评估后,利用生成的代理来设计一些基于泡沫的吸收器,以说明所提出方法的准确性和计算效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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