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Wavelet analysis-based method for determining contribution degree of surface topography of each level to shear strength

A technology of surface morphology and shear strength, applied in the direction of applying stable shear force to test the strength of materials, analyzing materials, strength characteristics, etc., can solve problems such as the inability to quantify the contribution rate of shear strength, and achieve maximum implementation value and Economic benefits, the effect of ensuring accuracy

Active Publication Date: 2020-06-12
NINGBO UNIV
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Problems solved by technology

[0009] In order to overcome the inability of the traditional method to quantify the contribution rate of the surface morphology of rock mass structural planes at all levels to the shear strength of the structural plane, the present invention provides a method based on wavelet analysis to measure the contribution of the surface morphology of rock mass structural planes at all levels to the shear strength. Determine the method, use wavelet analysis to realize the separation and reconstruction of the three-level elements (macro geometric contour, surface relief and microscopic roughness) of the rock mass discontinuity surface, and then determine the macroscopic geometric contour, surface relief and microcosmic roughness of the discontinuity surface. The Contribution of Roughness to the Shear Strength of Structural Surfaces

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  • Wavelet analysis-based method for determining contribution degree of surface topography of each level to shear strength
  • Wavelet analysis-based method for determining contribution degree of surface topography of each level to shear strength
  • Wavelet analysis-based method for determining contribution degree of surface topography of each level to shear strength

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] refer to Figure 1 to Figure 7 A method for determining the contribution of surface topography to shear strength at all levels based on wavelet analysis, comprising the following steps:

[0037] (1) Select the structural surface of the engineering rock mass to be analyzed, level the structural surface of the rock mass, perform surface cleaning treatment, perform three-dimensional scanning on the structural surface, and obtain the two-dimensional image after discrete processing of the surface morphology of the structural surface sample based on The image grayscale data extraction technology converts the structural surface measurement image into coordinate data. In this case, the rock mass structural surface contour curve with a length of 40cm is used;

[0038] (2) Select an appropriate wavelet basis function, and use MATLAB programming to peel off to obtain the ...

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Abstract

A wavelet analysis-based method for determining contribution degree of surface topography of each level to the shear strength comprises the following steps: performing three-level division on the surface morphology of the structural plane based on wavelet analysis, determining a macroscopic geometric profile, a surface undulating form and microcosmic roughness of the surface of the structural plane, and analyzing contribution of all levels of surface morphologies to the shear strength of the structural plane; through the shear strength contribution ratio Q of the macroscopic geometric profile,the surface fluctuation form and the microcosmic roughness of the surface of the structural surface, determining the contribution of all levels of surface morphologies to the shear strength of the structural plane of rock mass , wherein the larger the Q is, the larger the contribution of the surface geometrical characteristics to the shear strength of the structural surface is, and otherwise, thesmaller the contribution of the surface geometrical characteristics to the shear strength is. According to the method, the accuracy of structural plane surface form description is remarkably improved, and the molding time and economy are saved.

Description

technical field [0001] The invention belongs to the field of engineering technology, and relates to a quantitative research method based on wavelet analysis to determine the contribution degree of the surface morphology of rock mass structural planes at all levels to the shear strength of structural planes, especially the method proposed by the present invention based on wavelet analysis to analyze the surface morphology of structural planes. Carry out three-level division, determine the macro-geometric contour, surface undulation and micro-roughness of the structural surface surface, and analyze the contribution of the surface topography at all levels to the shear strength of the structural surface, which solves the problem that the traditional method cannot quantitatively analyze the various levels of the rock mass structural surface The question of the extent to which surface morphology contributes to shear strength. Background technique [0002] Structural plane is an im...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F30/13G01N1/28G01N1/36G01N3/24
CPCG01N3/24G01N1/28G01N1/36G01N2203/0025G01N2001/366G01N2203/0218G01N2203/0298
Inventor 雍睿杜时贵刘文连杨晓杰胡云进王秀庆郑荣跃
Owner NINGBO UNIV
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