Centre for ECO2 Vehicle Design, MWL, KTH Royal Institute of Technology, Stockholm, Sweden.
J Acoust Soc Am. 2013 May;133(5):EL426-30. doi: 10.1121/1.4802184.
The effects of relative alignment of two different types of anisotropic open cell porous materials are investigated in terms of the acoustic response of a multi-layered configuration. Numerical experiments, where gradient based optimization techniques were used, are conducted to find possible extremal values. It is shown that, depending on the degree of anisotropy of the porous material properties, their angular orientations have a significant and frequency dependent influence on the measured response. The results highlight the importance of further advancing the knowledge of anisotropic porous material behavior.
研究了两种不同类型各向异性开孔多孔材料的相对排列对多层结构声学响应的影响。通过数值实验，利用基于梯度的优化技术来寻找可能的极值。结果表明，取决于多孔材料性能的各向异性程度，其角向取向对测量的响应具有显著的、频率相关的影响。该结果强调了进一步提高各向异性多孔材料行为知识的重要性。
