Longitudinal wave scattering in thin plates with symmetric damage considering oblique incidence

Lopes, Kayc W.; Gonsalez-Bueno, Camila G.; Inman, Daniel J.; Bueno, Douglas D.

doi:10.1016/j.ultras.2023.107161

Cited by 1 publication

(1 citation statement)

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“…In seismic response studies under near-field conditions and damage detection of welded seams, the seismic wave incidence angle is not always perpendicular to the free boundary. For this reason, the effect of obliquely incident waves should be highlighted in the simulation of seismic wave fields under near-field conditions [56], in rock layer fracture damage investigation [57], and in structural non-destructive testing [58]. To verify the attenuation effect of the MVDB on obliquely incident pulse waves, a numerical model of homogeneous linear elastic and isotropic soil oblique incidence angles was established.…”

Section: Applicability Of Obliquely Incident Wave Fieldsmentioning

confidence: 99%

Multi-Directional Viscous Damping Absorbing Boundary in Numerical Simulation of Elastic Wave Dynamic Response

Zhao,

Yu,

et al. 2024

Applied Sciences

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Numerical seismic wave field simulation is essential for studying the dynamic responses in semi-infinite space, and the absorbing boundary setting is critical for simulation accuracy. This study addresses spherical waves incident from the free boundary by applying dynamic equations and Rayleigh damping. A new multi-directional viscous damping absorbing boundary (MVDB) method is proposed based on regional attenuation. An approximate formula for the damping value is established, which can achieve absorbing the boundary setting by only solving the mass damping coefficients without increasing the absorbing region grid cells or depending on the spatial and temporal walking distance. The validity and stability of the proposed method are proven through numerical calculations with seismic sources incident from different angles. Meanwhile, the key parameters affecting the absorption of the MVDB are analyzed, and the best implementation scheme is provided. In order to meet the requirements of mediums with different elastic parameters for boundary absorption and ensure the high efficiency of numerical calculations, the damping amplitude control coefficients k can be set between 1.02 and 1.12, the thickness of the absorbing region L is set to 2–3 times of the wavelength of the incident transverse wave, and the thickness of the single absorbing layer is set to the size of the discrete mesh of the model Δl.

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Section: Applicability Of Obliquely Incident Wave Fieldsmentioning

confidence: 99%