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M-UFSPML model, construction method, intelligent terminal and server

A construction method and model technology, applied in the field of M-UFSPML model construction based on the seismic anisotropic second-order wave system, can solve the problems of a large amount of memory and calculation, poor accuracy, etc., and achieve improved accuracy, excellent accuracy, and less calculation storage effect

Pending Publication Date: 2021-09-24
INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION
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Problems solved by technology

[0004] In summary, the existing problems in the prior art are: the existing second-order multi-axis separation PML (M-SPML) requires a large amount of memory and calculation; the accuracy is poor

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  • M-UFSPML model, construction method, intelligent terminal and server
  • M-UFSPML model, construction method, intelligent terminal and server
  • M-UFSPML model, construction method, intelligent terminal and server

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Embodiment Construction

[0064] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0065] Aiming at the problems existing in the prior art, the present invention provides a method for constructing an M-UFSPML model based on a seismic anisotropic second-order wave system. The present invention will be described in detail below in conjunction with the accompanying drawings.

[0066] Such as figure 1 As shown, the M-UFSPML model building method based on the seismic anisotropic second-order wave system provided by the embodiment of the present invention includes the following steps:

[0067] S101. Perform Fourier transform on the weak form of the time domain second-order linear elastic anisotropic wave equation...

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Abstract

The invention belongs to the technical field of perfect matching layer construction, and discloses an M-UFSPML model, a construction method, an intelligent terminal and a server, and the method comprises the steps: carrying out the Fourier transform of a weak form of a time domain second-order linear elastic anisotropy wave equation, and obtaining a corresponding frequency domain equation; on the basis of the concept of a multi-axis complete matching layer, adopting a complex coordinate continuation technology to carry out continuation on space variables in a weak form frequency domain wave equation, and obtaining a newly constructed artificial boundary, namely a non-split convolution multi-axis perfect matching layer. The precision of the newly constructed non-split convolution multi-axis perfect matching layer is improved compared with that of a previous multi-axis perfect matching layer, and meanwhile it can be guaranteed that calculation lasts for a long time and is stable. The newly constructed non-split convolution multi-axis perfect matching layer adopts a non-split form, the direct discrete space second-order partial derivative is avoided, the calculation efficiency is higher, the numerical result can ensure the numerical stability of more than 100,000 step lengths, and the precision is obviously superior to that of a low-order artificial boundary.

Description

technical field [0001] The invention belongs to the technical field of perfectly matching layer construction, and in particular relates to an M-UFSPML model, a construction method, an intelligent terminal, and a server, and in particular to a method for constructing an M-UFSPML model based on a seismic anisotropic second-order wave system. Background technique [0002] Currently, linear elastic anisotropy is a very common property in the Earth's interior or ice sheets (Diez). It may be caused by various mechanisms, such as preferred orientations of crystals, aligned inclusions or regular lamella sequences. In anisotropic media, the seismic wave velocity depends not only on its local propagation and polarization direction, but also on the wave type (compressional or shear body wave and Love or Rayleigh surface wave), and also on the local symmetry of the elastic model. In recent years, numerical wave simulations have been increasingly used as a tool to study the regional-sca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F17/11
CPCG06F30/23G06F17/11
Inventor 谢志南
Owner INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION
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