On an adaptive FEM-BEM for nonlinear transmission problem

Liu, D.J.; Qiu, Yuenan

doi:10.1016/j.aml.2021.107785

Cited by 1 publication

(1 citation statement)

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“…The transmission relationship of the overall system is analyzed using the FEM result from the base, which contains the perfectly matched layer and the external loading domain and has an impact on vibration transmission [ 30 ]. Varying from the line integral method mentioned in Section 3 , the edge surface integral algorithm is adopted for faster solving.…”

Section: Numerical Simulationsmentioning

confidence: 99%

An Investigation of the Energy Harvesting Capabilities of a Novel Three-Dimensional Super-Cell Phononic Crystal with a Local Resonance Structure

Xiang,

Chai,

Kou

et al. 2024

Sensors

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Using the piezoelectric (PZT) effect, energy-harvesting has become possible for phononic crystal (PnC). Low-frequency vibration energy harvesting is more of a challenge, which can be solved by local resonance phononic crystals (LRPnCs). A novel three-dimensional (3D) energy harvesting LRPnC is proposed and further analyzed using the finite element method (FEM) software COMSOL. The 3D LRPnC with spiral unit-cell structures is constructed with a low initial frequency and wide band gaps (BGs). According to the large vibration deformation of the elastic beam near the scatterer, a PZT sheet is mounted in the surface of that beam, to harvest the energy of elastic waves using the PZT effect. To further improve the energy-harvesting performance, a 5 × 5 super-cell is numerically constructed. Numerical simulations show that the present 3D super-cell PnC structure can make full use of the advantages of the large vibration deformation and the PZT effect, i.e., the BGs with a frequency range from 28.47 Hz to 194.21 Hz with a bandwidth of 142.7 Hz, and the maximum voltage output is about 29.3 V under effective sound pressure with a peak power of 11.5 µW. The present super-cell phononic crystal structure provides better support for low-frequency vibration energy harvesting, when designing PnCs, than that of the traditional Prague type.

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Section: Numerical Simulationsmentioning

confidence: 99%