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High-frequency seismic wave scattering simulating method based on fast multipole indirect boundary element method

A technology of boundary element method and simulation method, which is applied in special data processing applications, instruments, electrical and digital data processing, etc., to achieve the effect of reducing computer resource occupation, increasing computing speed, and achieving significant economic benefits.

Inactive Publication Date: 2015-12-23
TIANJIN CHENGJIAN UNIV +1
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Problems solved by technology

[0004] Aiming at the problem of high-frequency seismic wave scattering by irregular terrain, the present invention proposes a high-frequency seismic wave scattering simulation method based on the fast multi-pole indirect boundary element method

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  • High-frequency seismic wave scattering simulating method based on fast multipole indirect boundary element method
  • High-frequency seismic wave scattering simulating method based on fast multipole indirect boundary element method
  • High-frequency seismic wave scattering simulating method based on fast multipole indirect boundary element method

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Embodiment Construction

[0068] The technical solution of this patent will be further described in detail below in conjunction with specific embodiments.

[0069] see figure 1 , a high-frequency seismic wave scattering simulation method based on the fast multi-pole indirect boundary element method, the specific steps are:

[0070] (1) Establish boundary element model

[0071] Considering the incidence of plane waves (P or S and Rayleigh waves), based on the single-layer potential theory, virtual loads in three orthogonal directions are applied on the boundary surface to construct the scattering wave field; in establishing the boundary element model, the boundary surface is first discretized is a triangle or a quadrilateral to obtain a discrete unit; in order to facilitate the processing of the Green's function of the discrete unit, the uniform load of the inclined disk is used to approximate the discrete unit (such as the three-dimensional concave model, the same below).

[0072] It should be pointe...

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Abstract

The invention discloses a high-frequency seismic wave scattering simulating method based on a fast multipole indirect boundary element method. By combining a fast multipole method (FMM) and an indirect boundary element method (IBEM), the fast multipole indirect boundary element method based on diagonal plane wave expansion is given. According to the method, the high-frequency seismic wave scattering problem which cannot be solved through other methods (such as an analytical method, a finite difference method, a finite element method and a general boundary element method) can be quickly solved, hundreds of thousands of three-dimensional scattering problems can be completed in an ordinary personal computer, an effective method is supplied to high-frequency or large-scale seismic wave scattering simulating, computer resource occupying is greatly reduced while the calculating speed is improved, and the remarkable economic benefits are brought to fast simulating of practical engineering.

Description

technical field [0001] The invention relates to the field of seismic wave scattering simulation, in particular to a high-frequency seismic wave scattering simulation method based on a fast multi-pole indirect boundary element method. Background technique [0002] In recent years, with the rapid development of computer hardware, large-scale scientific computing has become increasingly important for modern technology research and development and large-scale engineering design. Among them, the scattering simulation of seismic waves by irregular terrain is a research hotspot in many disciplines, and can be widely used in the scientific determination of ground motions in complex terrain, geophysical exploration, rock and soil layer parameter inversion, etc. Theoretical analysis methods can be divided into analytical method and numerical method as a whole, among which numerical method includes domain discrete finite element method, finite difference method and boundary type bounda...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 刘中宪王冬梁玉国
Owner TIANJIN CHENGJIAN UNIV
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