Method for determining structural surface roughness coefficient dimension effect sample characterization unit

A technology of roughness coefficient and size effect, applied in the direction of measuring devices, instruments, etc., to achieve the effect of ensuring repeatability, solving uniqueness, and good reliability

Active Publication Date: 2015-08-12
SHAOXING UNIVERSITY
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Problems solved by technology

[0003] In order to overcome the inadequacy of existing technologies that cannot effectively solve the problem of the uniqueness of sample selection for the study of the size effect of the roughness coefficient of the structural surface and ensure the repeatability of the test results, the present invention provides an effective solution t...

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  • Method for determining structural surface roughness coefficient dimension effect sample characterization unit

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] refer to figure 1 , a method for determining the characterizing unit of a structural surface roughness coefficient size effect sample, comprising the following steps:

[0023] (1) Select a well-exposed typical rock mass structural surface as the research object of the size effect of the roughness coefficient, determine the potential sliding direction of the rock mass structural surface, and use a profilometer to measure the structural surface contour line with the largest research size of the size effect.

[0024] (2) Use a large-scale scanner to scan the drawings that record the outline of the structural surface and convert them into text in image format;

[0025] (3) Using morphological filter denoising and image normalization methods, Matlab software is used to extract the scanned image of the contour line of the structural surface according to the gray valu...

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Abstract

The invention provides a method for determining a structural surface roughness coefficient dimension effect characterization unit. The method comprises the steps of selecting a typical rock mass structural plane which is well exposed as a research object, by means of a surface shape factor measurement result for a field large-dimension rock mass structural surface, calculating an overlapping length of an adjacent structural surface roughness sample according to a sample dimension and number of samples, and performing iteration for extracting surface coordinate information of a series of dimension structural surface samples; computing the roughness coefficients of the series of samples, performing Weibull distribution probability density function fitting on overall distribution of sample data of different dimensions, and constructing a structural surface roughness coefficient dimension effect probability density function model; and through relative deviation analysis on the roughness coefficient and a representative evaluation index of each structural surface sample, searching a minimal value of a sample roughness coefficient characterization value on each dimension condition, and determining the structural surface roughness coefficient characterization unit. The method of the invention effectively settles a problem of ensuring uniqueness in selecting a structural surface roughness coefficient dimension effect research sample and ensuring repeatability of a test result.

Description

technical field [0001] The invention relates to a method for determining the sample characterization unit of the structural surface roughness coefficient size effect, specifically a roughness coefficient global search and sampling method based on the directional probability statistical analysis of the structural surface roughness coefficient, which is objective for studying the structural surface roughness coefficient size effect The law provides a selection method for a series of size specimens. Background technique [0002] It is a well-known phenomenon that the mechanical properties of the structural surface change with the increase of the sampling size. The size effect has become a part that cannot be ignored in the study of the mechanical behavior of the structural surface. Systematically summarizing and analyzing the size effect law of the shear strength of the structural surface is the key to solving large, It is the core of interrelationship of medium and small scale...

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Application Information

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IPC IPC(8): G01B21/30
CPCG01B21/20G01B21/30
Inventor 雍睿杜时贵黄曼梁奇锋罗战友胡云进钟振
Owner SHAOXING UNIVERSITY
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