Optimized mass and stiffness matrices for accurate and efficient 3D acoustic wave modeling
نویسندگان
چکیده
Numerical modeling of the 3D acoustic wave equation regularly faces a trade-off between accuracy and efficiency. Usually, an improved computational efficiency leads to compromised numerical accuracy, in which dispersion error increases. Such is commonly reported for finite difference methods, consistent, lumped, eclectic element matrices, high-order spectral methods. Therefore, we present methodology that simultaneously optimizes both method frequency domain. The objective function derived minimized tri-linear interpolation cube terms mass stiffness matrices. With four grid points per wavelength sampling, less than 0.5% velocities, optimized modeled solutions outperform results from extant approaches. experiments with homogeneous, unbounded 2-layer Society Exploration Geophysicists salt velocity models reveal persistent across all source-receiver offsets, performance observably absent other matrices are not only useful modeling, but also readily available accurate computation sensitivity density bulk modulus parameters multi-parameterization inversion.
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ژورنال
عنوان ژورنال: Earth and Space Science
سال: 2022
ISSN: ['2333-5084']
DOI: https://doi.org/10.1029/2021ea002112