The shielding effect of SH wave propagation in porous unidirectional infinite enclosed structure

Abstract

The wave dynamics within the porous unidirectional infinite enclosed structure involve the coupling of multiple scattering wave fields under complex boundary conditions. With specific frequency bands and structural designs, optimal absorption and shielding effects can be achieved. Currently, there is still a lack of comprehensive theoretical models that can efficiently and accurately analyze the shielding effect. This paper develops an accurate analytical method based on the wave function expansion for analyzing wave shielding in porous structures. Based on the multi-direction cumulative mirroring method, the reflection and scattering problems of shear-horizontal wave (SH wave) propagation at structural and pore boundaries are resolved. Through comprehensive set of visualization analysis steps, the full-domain dynamic wave response is presented. This approach enables quantitative and qualitative analysis of coupled wave amplitude distribution, shielded frequency bands, and shielding coefficients under variations in frequency bands, pore numbers, inter-pore spacing, and structural dimensions. This provides a robust framework for understanding and predicting wave propagation behavior in porous media. In addition, an analytical computing software has been developed for practical engineering applications, which improves the efficiency and accuracy of shielding wave structural optimization design and provides guidance on optimizing absorption and shielding effects of porous structures in practical engineering.

Keywords

• Wave propagation
• Porous structure
• Shielded frequency bands
• Shielding coefficients
• Analytical computing software