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March 26, 2026The Proceedings of Mechanical Engineering Congress Japan0 citationsOpen Access

Vibration damping analysis of L-shaped panels containing crater-type acoustic black holes with residual thickness

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JTJin TAJIMATYTakao YamaguchiCKChihiro KAMIO

Key Points

  • The research aims to analyze the vibration damping characteristics of L-shaped panels featuring crater-type acoustic black holes.
  • Hybrid vibration analysis utilizing Statistical Energy Analysis (SEA) and Finite Element Method (FEM).
  • Comparison of two L-shaped panels with and without crater-type black holes.
  • Evaluation of the impact of damping layer area on wave propagation.
  • Validation of the proposed SEA method for L-shaped panel vibration analysis.
  • Improved wave propagation characteristics observed with the introduction of the crater-type black hole.
  • Enhanced damping effects correlated with varying areas of damping layers.

Abstract

This paper describes hybrid vibration analysis using Statistical Energy Analysis（SEA）and FEM for two panels connected in L-shape with a crater-type acoustic black hole having a damping layer. We focused on the validation of the proposed SEA method and discuss the effects on the wave propagation characteristics between two panels in an L-shaped panel structure and effects of area of damping layers when the L-shaped panel structure was given a cratered black hole with a residual plate thickness.

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Cite This Study

TAJIMA et al. (2025) studied this question.

synapsesocial.com/papers/69c4cdb6fdc3bde44891a6d2https://doi.org/10.1299/jsmemecj.2025.j101p-25
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  3. 3Wave propagation in a honeycomb sandwich panel of variable thickness: model and characterisation of the Black Hole Acoustic effect2024 · 1 citations
  4. 4Research on the influence of core plate joint surface type on the vibration performance of acoustic black hole sandwich panels2024 · 1 citations
  5. 5Vibration study of CFRP laminated plates with acoustic black holes under hygrothermal environment2026