2024 Discrete wavenumber method

Discrete wavenumber method

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August undefined, 2024

WebApr 11, 2024 · Aiming at the problem of sparse measurement points due to test conditions in engineering, a smoothing method based on zero-padding in the wavenumber domain is proposed to increase data density. Firstly, the principle of data extension and smoothing is introduced. The core idea of this principle is to extend the discrete data series by zero … WebThe discrete wavenumber method is used to compute synthetic full-waveform acoustic logs in axisymmetric multilayered boreholes and to perform the frequency-wavenumber analysis of the radiated wave field. The stress-displacement vector is propagated through the layers using a numerically improved formulation of the Thomson-Haskell method.In …

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WebApr 2, 2007 · The discrete wavenumber-finite element method-WFEM- [14] implemented in the COMPSYN code [15] is a method to calculate synthetic ground motion seismograms … WebThis study is the first step towards the use of discrete wavenumber methods to model ground vibration from underground trains. Discrete wavenumber methods fall into three categories: the discrete wavenumber fictitious force method, the discrete wavenumber finite element methodand the discrete wavenumber boundary element method. This study blood in the water witt lowry lyrics

Static and dynamic displacement near a fault with the …

WebThe discrete wave‐number boundary element method is extended to apply to three‐dimensional elastodynamic problems. The method—which was first introduced … WebThe method utilizes a discrete wavenumber decomposition for the horizontal dependence of the wave motion in terms of a Fourier-Bessel series. The series representation is exact if summed to infinity and consequently eliminates the need to integrate a continuous Bessel transform numerically. WebOct 23, 2024 · Usually, in the discrete wavenumber method (DWN) the horizontal wavenumber is discretized and Fourier analysis permits to go to time domain (see Bouchon and Aki 1977; Bouchon 2003). Theory allows solving the problem of the homogeneous boundary conditions in terms of an eigenvalue problem. free creek album

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The discrete wavenumber/finite element method for synthetic …

WebA method based on a discrete horizontal wave-number representation of seismic-source wave fields is developed and applied to the study of the near-field of a seismic source embedded in a layered medium. ... (1973) results for a propagating fault in an infinite medium. In both cases, a remarkably good agreement is found. The method is applied to ... WebThe discrete wavenumber method is used to compute synthetic full‐waveform acoustic logs in axisymmetric multilayered boreholes and to perform the … blood in the water tf2WebThe method utilizes a discrete wavenumber decomposition for the horizontal dependence of the wave motion in terms of a Fourier-Bessel series. The series representation is … free creek clipart

"WebBouchon, M., 1981, A simple method to calculate Green’s functions for elastic layered media: Bulletin of the Seismological Society of America, 71, 959–971. BSSAAP 0037-1106 Crossref Web of Science Google Scholar; Bouchon, M., 2003, A review of the discrete wavenumber method: Pure and Applied Geophysics, 160, 445–465, doi: . " - Discrete wavenumber method

Discrete wavenumber method

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WebMay 15, 2003 · The formulation by the discrete wavenumber method implicitly includes static component as the real part of zero frequency, so this method might compute seismograms with both dynamic and static components of near-field ground motions. We can obtain static displacement by simply setting ω =0. WebThe algorithm is extended to include simultaneous evaluation of multiple sources at different depths. This feature is the same as in Olson's finite element discrete Fourier Bessel …

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WebOct 13, 2024 · The discrete wavenumber (DWN) method (e.g., Bouchon, 2003) has been established as a method to calculate complete elastic wavefield, including permanent … WebAbstract. — We present a review of the discrete wavenumber (DWN) method. The method, introduced by Bouchon and Aki (1977), allows the simple and accurate calculation of the complete Green's functions for many problems in elastodynamics. Download to read the …

WebDiscrete wavenumber methods fall into three categories: the discrete wavenumber fictitious force method, the discrete wavenumber finite element methodand the discrete … WebApr 1, 1999 · The method of calculation used is a boundary element method in which the Green’s functions are computed by the discrete wavenumber method. For simplicity, the 2-D elastodynamic diffraction problem is considered. The rock matrix is supposed to be elastic, isotropic and homogeneous, while the cracks are all empty and have the same …

WebJan 1, 2011 · The wavenumber integration technique is basically a numerical implementation of the integral transform technique for horizontally stratified media … WebFeb 1, 2008 · The Localized Boundary Integral Equation–Discrete Wavenumber Method for Simulating P-SV Wave Scattering by an Irregular TopographyLocalized Boundary …

WebApr 14, 2024 · This method based on such discrete transforms provides optimal accuracy in that the rate of convergence for suitably smooth solutions is faster than any power of the mesh of \({N}_{x} ... Based on the stability analysis of Appendix C of the supporting information document, we selected the critical wavenumber \({q}_{0}=2\pi /{\lambda …

Webdiscrete wavenumber summation method. No comparison the heterogeneous formulation and the discrete wavenumber method has been made. The second order approximation to the solid-liquid interface produced seismograms that compared 'well with the discrete wavenumber seismograms. A detailed comparison between the seismograms … free creepy background musicWebThe approach is based on the representation of the interfaces by distributions of body forces, the radiation from which is equivalent to the scattered wave field produced by the diffracting boundaries. The Green’s functions are evaluated by … blood in the water wotlkWebSH Wave Number Green’s Function for a Layered, Elastic Half-Space. Part I: Theory and Dynamic Canyon Response by the Discrete Wave Number Boundary Element Method (PDF) SH Wave Number Green’s Function for a Layered, Elastic Half-Space. free creepy clown picturesWebApr 11, 2024 · had been substituted by "The basic core concept of this study, which is based on the DFT operation and zero-padding, is an extended smoothing method for two-dimensional discrete data. " Line 104: "This procedure complements the original sequence with zeroes and adds no additional information to the angular spectrum of the wave … blood in the westWebSep 1, 1989 · The discrete wavenumber‐boundary integral equation method is formulated for this case and is applied to the problem of diffraction of an elastic wave field by a ridge‐shaped topography. The... free creekWebMay 1, 1984 · The method utilizes a discrete wavenumber decomposition for the horizontal dependence of the wave motion in terms of a Fourier-Bessel series. The … free creepy cross stitch patternsWebApr 11, 2024 · In the first step, the discrete signal is transformed from the spatial domain to the wavenumber domain by two-dimensional DFT. It is complicated to process discrete … free creepy stock footage