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March 21, 2026Case Studies in Construction MaterialsOpen Access

An analysis of broadband low-frequency sound insulation in porous functionally graded sandwich panel with vertical strut combined re-entrant auxetic cellular core

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Authors

QLQian LiuHuanghuai UniversityZLZhongxun LiuTFTao FuKunming University of Science and Technology

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Implication

Analysis shows enhanced sound transmission loss in novel sandwich panels, suggesting efficient sound insulation solutions.

Key Points

  • This research aims to analyze the sound insulation characteristics of a new sandwich panel design with auxetic cellular cores.
  • Developed a theoretical model using first-order shear deformation theory and the Hamiltonian principle.
  • Examined various pore distribution patterns while employing power-law and exponential material gradation.
  • Conducted fluid-structure interaction analysis using Navier's method.
  • Validated theoretical predictions against experimental and simulation results.
  • The auxetic core design significantly improves sound transmission loss compared to conventional structures.
  • Optimal sound insulation was achieved with a power-law gradient and Type-B pore arrangement.
  • Type-B showed an 11.33% higher average sound transmission loss than the uniform Type-A distribution.
  • Systematic analysis revealed the impact of structural parameters on the sound transmission loss.

Cite This Study

Liu et al. (2026) studied this question.

synapsesocial.com/papers/69be362d6e48c4981c674f06https://doi.org/10.1016/j.cscm.2026.e06000
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