An equivalent lattice-modified model of interfering Bragg bandgaps and Locally Resonant Stop Bands for phononic crystal made from Locally Resonant elements

Redondo, Javier; Godinho, L.; Staliūnas, Kęstutis; Sánchez‐Pérez, J. V.

doi:10.1016/j.apacoust.2023.109555

Cited by 5 publications

(2 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is worth noting that LR-BGs have a more limited frequency range compared to Bragg-BGs. The interaction between LR-BGs and Bragg-BGs has been explored [37][38][39] and at times, the interaction between these two wave propagation phenomena fails to yield improvements in the sound insulation capacity of SCNBs [40,41]. This study is specifically designed to bridge the identified gap by examining the impact of the interaction between local resonance bandgaps (LR-BG) and Bragg bandgaps (Bragg-BG), particularly focusing on the enhancement of Bragg-BG insulation capabilities when the LR-BG exhibits higher frequencies.…”

Section: Introductionmentioning

confidence: 99%

Sonic Crystal Noise Barrier with Resonant Cavities for Train Brake Noise Mitigation

Ramírez-Solana,

Galiana-Nieves,

Picó

et al. 2024

Applied Sciences

Self Cite

View full text Add to dashboard Cite

In an experimental investigation, the development of sonic crystal noise barriers (SCNBs) is undertaken to address the issue of train brake noise (TBN), focusing on the use of local resonances in scatterers of sonic crystals. Recent research has shown that the inclusion of cavity resonators in the crystal scatterers allows for the modification of their insulating properties. In those works, it has been demonstrated that this interaction can be used to build highly insulating structures. The study proposes an SCNB design that includes a resonant cavity specifically to mitigate TBN and validates this design through experimental measures. The experiments confirm the enhanced sound insulation capabilities of SCNBs, compare them to the conventional noise barriers ones and demonstrate the applicability and effectiveness of the proposed design in real-world scenarios.

show abstract

Section: Introductionmentioning

confidence: 99%

Sonic Crystal Noise Barrier with Resonant Cavities for Train Brake Noise Mitigation

Ramírez-Solana,

Galiana-Nieves,

Picó

et al. 2024

Applied Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

“…These crystals have shown potential for various applications due to their unique properties. Two mechanisms generate bandgaps in phononic crystals: Bragg scattering [6,7] and local resonance [8][9][10][11]. The first phenomenon is primarily caused by the periodicity of the structure, while the second is mainly due to the resonance properties of the individual crystal cells.…”

Section: Introductionmentioning

confidence: 99%

Low-Frequency Bandgap Characterization of a Locally Resonant Pentagonal Phononic Crystal Beam Structure

Zhang,

Qian,

Zhang

et al. 2024

Materials

View full text Add to dashboard Cite

This paper proposes a local resonance-type pentagonal phononic crystal beam structure for practical engineering applications to achieve better vibration and noise reduction. The energy band, transmission curve, and displacement field corresponding to the vibration modes of the structure are calculated based on the finite element method and Bloch-Floquet theorem. Furthermore, an analysis is conducted to understand the mechanism behind the generation of bandgaps. The numerical analysis indicates that the pentagonal unit oscillator creates a low-frequency bandgap between 60–70 Hz and 107–130 Hz. Additionally, the pentagonal phononic crystal double-layer beam structure exhibits excellent vibration damping, whereas the single-layer beam has poor vibration damping. The article comparatively analyzes the effects of different parameters on the bandgap range and transmission loss of a pentagonal phononic crystal beam. For instance, increasing the thickness of the lead layer leads to an increase in the width of the bandgap. Similarly, increasing the thickness of the rubber layer, intermediate plate, and total thickness of the phononic crystals results in a bandgap at lower frequencies. By adjusting the parameters, the beam can be optimized for practical engineering purposes.

show abstract

A phononic crystal suspension for vibration isolation of acoustic loads in underwater gliders

Yang,

Chang,

Wang

et al. 2024

Applied Acoustics

View full text Add to dashboard Cite

An equivalent lattice-modified model of interfering Bragg bandgaps and Locally Resonant Stop Bands for phononic crystal made from Locally Resonant elements

Cited by 5 publications

References 36 publications

Sonic Crystal Noise Barrier with Resonant Cavities for Train Brake Noise Mitigation

Sonic Crystal Noise Barrier with Resonant Cavities for Train Brake Noise Mitigation

Low-Frequency Bandgap Characterization of a Locally Resonant Pentagonal Phononic Crystal Beam Structure

A phononic crystal suspension for vibration isolation of acoustic loads in underwater gliders

Contact Info

Product

Resources

About