A method for quantifying the potential damage degree of structural surfaces based on asperity wear volume

Abstract

The present invention relates to the technical field of research on potential damage of structural surface shear, and specifically to a method for quantifying the potential damage degree of structural surface based on micro-convex wear volume. The method comprises: constructing a three-dimensional surface composed of triangular units; obtaining a shear direction vector, a projection vector and a geometric inclination angle corresponding to the triangular unit; calculating a first angle using the shear direction vector and the projection vector; calculating an apparent inclination angle based on the first angle and the geometric inclination angle; obtaining the protrusion height, and screening out potential damage triangular units according to the apparent inclination angle and the protrusion height; reducing the apparent inclination angle of the potential damage triangular unit by a set angle, and then reducing the protrusion height by a set distance to obtain a second deformed damage triangular unit; calculating the potential damage volume based on the potential damage triangular unit and the second deformed damage triangular unit, and then obtaining the potential damage degree. The present invention can accurately describe the potential damage degree of the structural surface during the shearing process.

Description

Technical Field

[0001] The invention relates to the technical field of research on potential shear damage of structural surfaces, and in particular to a method for quantifying the degree of potential damage of structural surfaces based on micro-convex wear volume. Background Art

[0002] Internal defects in rock mass engineering mainly include structural surfaces and microcracks and pores inside the rock blocks. Among them, structural surfaces are the key factors controlling the mechanical properties of rock mass. In actual engineering, it is common for rock mass to suffer shear failure along structural surfaces (i.e., structural surface shear type disasters), such as static disasters such as rock slope instability sliding and dam foundation sliding under low stress, and dynamic impact disasters such as structural surface sliding type rock burst and fault sliding type earthquake under high stress. Therefore, the shear mechanical properties of structural surfaces are regarded as the key factors affecting the stability of rock mass. The shear strength and damage degree of structural surfaces are important indicators of shear mechanical properties in the fields of mechanics and morphology, respectively, and the two are interdependent and closely related. The shear strength of structural surfaces has been fully studied, while the related research on the damage degree of structural surfaces is relatively small. In order to correctly understand the shear mechanical properties of rock mass structural surfaces and then ensure the safety and stability of rock mass engineering (water conservancy and hydropower, coal mines, high-level radioactive waste disposal, etc.), it is necessary to propose a quantitative method for the potential damage degree of structural surfaces.

[0003] At present, the research method on the damage degree of structural surface shear is mainly to obtain the surface graphics of the structural surface after the structural surface is sheared, and analyze the shear scratches through graphic recognition technology. This method can only identify and quantify the damage degree of the structural surface after the structural surface is sheared and the damage occurs, and what is identified is the shear scratches of the structural surface. This method is a two-dimensional processing method and cannot reflect the damage of the structural surface in three-dimensional space. In addition, the analysis results are significantly affected by factors such as lighting and image processing threshold. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a method for quantifying the potential damage degree of a structural surface based on the wear volume of micro-convex bodies. The technical solution adopted is as follows:

[0005] An embodiment of the present invention provides a method for quantifying the potential damage degree of a structural surface based on micro-asperity wear volume, which specifically includes: acquiring point cloud data of a rock structural surface, and constructing a three-dimensional surface composed of triangular units based on the point cloud data;

[0006] For any triangular unit, obtain its shear direction vector, the projection vector of the external normal of the triangular unit on the shear plane, and the geometric inclination angle of the triangular unit;

[0007] Calculating a first angle corresponding to the triangular unit using the shear direction vector and the projection vector;

[0008] Calculate the apparent inclination angle of the triangular unit based on the first angle and the geometric inclination angle of the triangular unit;

[0009] Acquire the protrusion height of the triangular unit according to the coordinates of the three end points of the triangular unit;

[0010] Screen out potential damaged triangle units according to the visual inclination angles and protrusion heights of all triangle units;

[0011] The visual inclination angle of the potential damaged triangle unit is reduced by a set angle to obtain a first deformed damaged triangle unit;

[0012] The protrusion height of the first deformed and damaged triangle unit is reduced by a set distance to obtain a second deformed and damaged triangle unit;

[0013] Calculating a potential damage volume based on the potential damage triangle unit and its corresponding second deformed damage triangle unit;

[0014] The sum of the potential damage volumes corresponding to each potential damage triangle unit is the potential damage degree.

[0015] Preferably, the first angle corresponding to the triangular unit is:

[0016]

[0017] Where α represents the first angle; cos -1 Represents the inverse function of the cosine function; represents the shear direction vector; Represents the projection vector of the triangle element's external normal onto the clipping plane.

[0018] Preferably, the viewing angle is:

[0019] θ * =tan -1 (-tan(θ)·cos(α)),

[0020] Among them, θ * Indicates the visual inclination angle; tan -1 represents the inverse function of the tangent function; α represents the first angle; θ represents the geometric inclination angle of the triangular unit.

[0021] Preferably, obtaining the protrusion height of the triangular unit according to the coordinates of the three endpoints of the triangular unit includes:

[0022] The absolute value of the sum of the Z-axis coordinates of the three endpoints of the triangular unit is obtained, and the average is calculated to obtain the protrusion height.

[0023] Preferably, the potentially damaged triangular units are screened out according to the visual inclination angles and protrusion heights of all triangular units, including:

[0024] The maximum viewing inclination angle and the maximum protrusion height of the viewing inclination angle and the protrusion height screen of all triangular units are obtained; based on the maximum viewing inclination angle and the maximum protrusion height, the viewing inclination angle critical value and the protrusion height critical value are obtained respectively; the triangular units whose viewing inclination angle is greater than or equal to the viewing inclination angle critical value and whose protrusion height is greater than or equal to the protrusion height critical value are potential damaged triangular units.

[0025] Preferably, the visual inclination angle of the potential damage triangle unit is reduced by a set angle to obtain a first deformed damage triangle unit, comprising:

[0026] Ensure that the two end points of the base of the potential damage triangle unit remain unchanged, change the end points in the Z-axis direction, until the viewing angle of the potential damage triangle unit is reduced by a set angle, and obtain a first deformed damage triangle unit; and calculate and obtain the set angle based on the viewing angle of the potential damage triangle unit and the viewing angle critical value.

[0027] Preferably, the protrusion height of the first deformed and damaged triangular unit is reduced by a set distance to obtain a second deformed and damaged triangular unit, comprising:

[0028] The three endpoints of the first deformed damaged triangle unit are lowered at equal distances, and when the lowered distance reaches a set distance, a second deformed damaged triangle unit is obtained; the set distance is obtained by calculating based on the protrusion height of the potential damaged triangle unit and the protrusion height critical value.

[0029] Preferably, calculating the potential damage volume based on the potential damage triangle unit and its corresponding second deformed damage triangle unit includes:

[0030] The potential damage triangle unit and its corresponding second deformation damage triangle unit form a pentahedron, and the volume of the pentahedron is calculated to obtain the potential damage volume.

[0031] The embodiments of the present invention have at least the following beneficial effects: based on the three-dimensional laser scanning of the rock structural surface to obtain its point cloud data and its three-dimensional curved surface, the structural surface can be analyzed in three-dimensional space, and the changes in the damage of the structural surface during the shearing process can be more comprehensively reflected. Moreover, dividing it into triangular units is more convenient for subsequent analysis of potential damage to the structural surface; further, after obtaining the shear direction vector corresponding to the structural surface, the projection vector of the external normal on the shear plane and the geometric inclination angle of the triangular unit, the visual inclination angle and the protrusion height of the triangular unit are obtained, wherein the triangular unit with too large visual inclination angle and protrusion height has the potential to be damaged. The risk of injury can be detected by screening out triangular units with too large visual inclination angles or too large protrusion heights based on this feature, which can accurately describe the potential damage of the structural surface during the shearing process. At the same time, the screened potential damage triangular units are changed twice to obtain the first deformed damage triangular unit and the second deformed damage triangular unit, which can simulate the change of structural surface damage during the shearing process, and calculate the volume of the polyhedron composed of the second deformed damage triangular unit and the corresponding triangular unit to represent the degree of damage during the shearing process. The present invention can accurately describe the change of the structural surface during the shearing process in three-dimensional space, and thus accurately obtain the potential degree of damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A method flow chart of a method for quantifying the potential damage degree of a structural surface based on micro-convex wear volume provided in an embodiment of the present invention

[0034] Figure 2 A schematic diagram of the visual inclination angle of a method for quantifying the potential damage degree of a structural surface based on the wear volume of micro-asperities provided in an embodiment of the present invention;

[0035] Figure 3 A schematic diagram of the first transformation of a method for quantifying the potential damage degree of a structural surface based on the wear volume of micro-asperities provided in an embodiment of the present invention;

[0036] Figure 4 A schematic diagram of the second transformation of a method for quantifying the potential damage degree of a structural surface based on the wear volume of micro-asperities provided in an embodiment of the present invention;

[0037] Figure 5A polyhedral schematic diagram of a method for quantifying the potential damage degree of a structural surface based on micro-asperity wear volume provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the method for quantifying the potential damage degree of a structural surface based on the wear volume of micro-convex bodies proposed by the present invention, its specific implementation method, structure, characteristics and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.

[0039] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0040] The specific scheme of the method for quantifying the potential damage degree of a structural surface based on the wear volume of micro-asperities provided by the present invention is described in detail below with reference to the accompanying drawings.

[0041] Example:

[0042] The main application scenarios of the present invention are: during the rock construction process, special attention should be paid to the damage to the structural surfaces caused by the shear process between the structural surfaces. Once the structural surfaces are damaged, it will affect the subsequent construction process and the safety of the construction. Therefore, it is necessary to analyze the potential damage of the structural surfaces, and then quantify it to obtain corresponding indicators for reference during subsequent construction. In order to conduct a more comprehensive study on the potential damage of the structural surfaces, further analysis is required in three-dimensional space.

[0043] See also Figure 1 , which shows a method flow chart of a method for quantifying the potential damage degree of a structural surface based on micro-convex wear volume provided by an embodiment of the present invention, the method comprising the following steps:

[0044] Step S1, obtain point cloud data of the rock structure surface, and construct a three-dimensional surface composed of triangular units based on the point cloud data; for any triangular unit, obtain its shear direction vector, the projection vector of the external normal of the triangular unit on the shear plane, and the geometric inclination angle of the triangular unit.

[0045] The shear process of the rock structural surface is a process that changes in three-dimensional space and is a process quantity. In the embodiment of the present invention, the parameters in the shear process need to be set. The time interval for calculating the damage in the shear process is set to Δt, the current moment is t=N·Δt, the shear rate is v, the shear displacement is η, and a detailed analysis is required in three-dimensional space. Furthermore, a three-dimensional laser scanning experiment is carried out on the rock structural surface. It should be noted that the upper structural surface and the lower structural surface are targeted here to obtain their point cloud data, and then the point cloud data is imported into MATLAB for further analysis.

[0046] Furthermore, in MATLAB, the distances from each point on the surface of the structural surface to the left side, front side and bottom surface are calculated and defined as new X, Y and Z coordinates, so as to realize the reconstruction of the coordinates of the three-dimensional structural surface. At the same time, in order to facilitate the subsequent analysis of potential damage to the shearing of the structural surface, the coordinates of the X-axis, Y-axis and Z-axis need to be processed. Specifically, the Z coordinate of each point is uniformly subtracted from the mean of all Z values. In the X-axis direction, the values ​​are uniformly taken at an interval of 0.25 mm between Xmin and Xmax, and the same method is used to uniformly take values ​​in the Y-axis direction. The corresponding Z-axis coordinates are obtained by linear interpolation, thereby realizing the homogenization of the three-dimensional structural surface.

[0047] The processed point cloud data is then imported into Geomagic for packaging to obtain a three-dimensional surface composed of a series of triangular units.

[0048] Regarding the surface of the structural surface, the basic geometric elements of the surface of the structural surface include the apparent inclination angle and the protrusion height of the micro-convex body. The micro-convex body (i.e., the triangular unit) with a larger apparent inclination angle is more likely to be sheared during the shearing process. The micro-convex body with a larger protrusion height is more severely abraded during the shearing process. Therefore, it is necessary to analyze the apparent inclination angle and protrusion angle of the triangular unit.

[0049] Since the three-dimensional coordinates of the three-dimensional structural surface are reconstructed, in the reconstructed coordinate system, it is necessary to obtain the shear direction of each triangular unit, the projection of the external normal of the triangular unit on the shear plane, and the geometric inclination of the triangular unit, such as Figure 2 As shown, Represents the projection vector of the external normal of the triangle unit on the shear plane; θ represents the geometric inclination of the triangle unit, ABC represents the triangle unit, n0 represents the external normal vector of the shear plane, n represents the external normal direction vector of the triangle unit, and s represents the shear direction vector.

[0050] At this point, the shearing direction of each triangular unit, the projection of the external normal of the triangular unit on the shearing plane and the geometric inclination of the triangular unit can be obtained.

[0051] Step S2, using the shear direction vector and the projection vector to calculate the first angle corresponding to the triangular unit; calculating the apparent inclination angle of the triangular unit based on the first angle and the geometric inclination angle of the triangular unit; and obtaining the protrusion height of the triangular unit according to the coordinates of the three endpoints of the triangular unit.

[0052] In step S1, the shearing direction of each triangular unit is obtained. After the projection of the external normal of the triangular unit on the shearing plane and the geometric inclination of the triangular unit, the visual inclination angle of each triangular unit needs to be calculated. Specifically, Figure 2 As shown, it is necessary to calculate the first angle corresponding to a triangular unit based on the shear direction vector and the projection vector of the triangular unit, that is, the angle between the shear direction vector and the projection vector. The first angle corresponding to the triangular unit is specifically:

[0053]

[0054] Where α represents the first angle; cos -1 Represents the inverse function of the cosine function; represents the shear direction vector; Represents the projection vector of the external normal of the triangle unit on the clipping plane. It should be noted that: and s both represent the shear direction vector, the difference lies in the way the vector is represented.

[0055] Further, the visual inclination angle of the triangular unit is calculated from the first angle of the triangular unit and the geometric inclination angle of the triangular unit, specifically:

[0056] θ * =tan -1 (-tan(θ)·cos(α)),

[0057] Among them, θ * Indicates the visual inclination angle; tan -1 represents the inverse function of the tangent function; α represents the first angle; θ represents the geometric inclination angle of the triangular unit. Thus, the geometric inclination angles of all triangular units can be obtained. For a structural surface in three-dimensional space, the apparent inclination angle of its triangular unit is an important indicator reflecting the degree of damage to the structural surface during shearing.

[0058] Furthermore, it is necessary to calculate the protrusion height of each triangular unit. Specifically, it is necessary to calculate according to the coordinates of the three endpoints of the triangular unit. Specifically, the absolute value of the sum of the Z-axis coordinates of the three endpoints of the triangular unit is obtained, and the average is calculated to obtain the protrusion height, which is expressed as follows:

[0059]

[0060] Among them, Z A , Z B and Z C Respectively represent the Z-axis coordinates of the three endpoints of the triangular unit, and h represents the convex height of the triangular unit. So far, the apparent inclination angle and convex height of each triangular unit have been obtained. During the shearing process of the structural surface, the apparent inclination angle and convex height of the triangular unit can determine the degree of damage to its structural surface.

[0061] Step S3, screening out potential damaged triangular units according to the visual inclination angles and protrusion heights of all triangular units; reducing the visual inclination angle of the potential damaged triangular unit by a set angle to obtain a first deformed damaged triangular unit; reducing the protrusion height of the first deformed damaged triangular unit by a set distance to obtain a second deformed damaged triangular unit.

[0062] After obtaining the apparent inclination angle and protrusion height of each triangular unit, it is necessary to perform analysis based on the apparent inclination angle and protrusion height to obtain the potential degree of damage to the structural surface during the shearing process.

[0063] During the shearing process, the damaged area on the surface of the rock structure is composed of micro-protrusions with large apparent inclination angles and heights. The triangular units with apparent inclination angles and protrusion heights greater than the critical values ​​can be regarded as potential damaged areas. During the shearing process, they will suffer damage. Therefore, the triangular units need to be screened according to the apparent inclination angles and protrusion heights.

[0064] Specifically, the maximum values ​​of the viewing angle and the convex height in all triangular units are obtained to obtain the maximum viewing angle and the maximum convex height. At the same time, considering the instability of the maximum viewing angle and the maximum convex height, it is necessary to take 0.98 times the maximum viewing angle and the maximum convex height as the nominal maximum value. The nominal maximum values ​​of the maximum viewing angle and the maximum convex height are 0.98 times the maximum viewing angle and the maximum convex height, respectively, and are recorded as and h max Furthermore, it is necessary to take 0.8 times the nominal maximum value of the maximum viewing angle and the maximum convex height as the viewing angle critical value. and the critical value of the protrusion height h cr It should be noted that the nominal maximum values ​​of 0.8 times the maximum apparent inclination angle and the maximum protrusion height are taken as the critical values ​​of the apparent inclination angle and the protrusion height. They are set according to actual conditions and can be adjusted by implementers based on actual conditions. The adjustment restrictions include but are not limited to the actual structure of the structural surface, construction requirements and environment, etc.

[0065] Further, the triangular units whose viewing angle is greater than or equal to the viewing angle critical value and whose protrusion height is greater than or equal to the protrusion height critical value are screened out, that is, and The triangular element is used as the potential damage triangular element.

[0066] As the shearing process proceeds, the micro-asperities gradually climb, erode, and shear off, which is reflected in the gradual decrease of the apparent inclination angle and the height of the protrusion. In the theoretical model, this process can be decomposed into two parts: (1) the apparent inclination angle of the micro-asperity gradually decreases to a threshold; (2) the apparent inclination angle of the micro-asperity no longer changes, and the height of the protrusion gradually decreases to a threshold. The characteristics of the micro-asperities described here are applicable to triangular units, so the potential damage triangular unit needs to be transformed to Figure 3 Taking the potential damage triangle unit A0B0C0 as an example, the initial coordinates of each endpoint are (X 0A , Y 0A , Z 0A )、(X 0B , Y 0B , Z 0B )、(X 0C , Y 0C , Z 0C ).

[0067] When the damaged triangle unit is transformed for the first time, the two end points of the base of the potential damaged triangle unit are kept unchanged, that is, the A0 and B0 points are kept unchanged, and the end points in the Z-axis direction are changed, so that the C0 point moves along the fitting plane in the Z-axis direction until the viewing angle of the potential damaged triangle unit is reduced to a set angle, where the set angle is calculated based on the viewing angle of the damaged triangle unit and the viewing angle critical value, specifically: That is, when the visual inclination angle of the damaged triangle unit decreases to When the first deformation damage triangle unit A1B1C1 is obtained, the coordinates of the three endpoints are adjusted to (X 1A , Y 1A , Z 1A )、(X 1B , Y 1B , Z 1B )、(X 1C , Y 1C , Z 1C ).

[0068] Then, for the first deformed damaged triangular unit A1B1C1, the convex height needs to be transformed. During the transformation, the three endpoints need to be lowered at equal distances. When the lowering distance reaches the set distance, the second deformed damaged triangular unit A2B2C2 is obtained. The coordinates of the three endpoints of the first deformed damaged triangular unit A1B1C1 are adjusted to (X 2A , Y 2A , Z2A )、(X 2B , Y 2B , Z 2B )、(X 3C , Y 3C , Z 3C ), where the set distance is calculated based on the convex height of the potential damage triangle unit and the convex height critical value, specifically (hh cr )·10%. So far, the second deformation loss triangle unit can be obtained. The first deformation loss triangle unit and the second deformation loss triangle unit can describe the damage of the part of the structural surface during the shearing process to a certain extent, and can more accurately describe the potential damage of the structural surface during the shearing process. It should be noted that the values ​​of the set angle and the set distance are determined according to the actual situation. For different shearing processes, these two values ​​may be different, and the implementer needs to determine them according to the actual situation.

[0069] Step S4, calculating the potential damage volume based on the potential damage triangle unit and its corresponding second deformed damage triangle unit; the sum of the potential damage volumes corresponding to the potential damage triangle units is the potential damage degree.

[0070] Step S3 obtains the second deformed damage triangle unit corresponding to the potential damage triangle unit, wherein the projections of the potential damage triangle unit and its corresponding second deformed damage triangle unit on the XOY plane are consistent. The degree of damage to the structural surface during the shearing process can be measured by the wear volume of the micro-convex body, that is, the volume of the polyhedron composed of the potential damage triangle unit and its corresponding second deformed damage triangle unit, such as Figure 5 As shown, the corresponding second deformed damaged triangular unit of the potential damaged triangular unit is a pentahedron A0B0C0A2B2C2.

[0071] To calculate the volume of the pentahedron, you need to divide the pentahedron and then add them together to get the total volume, specifically:

[0072]

[0073] Among them, V 总 represents the total volume of the pentahedron, and is the volume of each polyhedron after segmentation.

[0074] At this time, after all the potential damage triangular units of the structural surface are adjusted, the surface morphology of the structural surface at time t=Δt is obtained, and then the potential damage volume corresponding to all the potential damage triangular units can be obtained. The sum of all the potential damage volumes is the potential damage degree of the structural surface at that moment; t=Δt means that the structural surface is in full contact within the period from 0 to Δt.

[0075] It should also be noted that the shearing of the structural surface is a process quantity. As the shearing proceeds, the upper structural surface and the lower structural surface may not be completely in contact with each other, but are partially offset. In the embodiment of the present invention, it is assumed that the structural surfaces are completely in contact with each other during the period from 0 to Δt. After a time greater than t=Δt, the structural surfaces are not completely in contact, and are offset by v·Δt. Taking the period from Δt to 2Δt as an example, the 0≤X≤X behind the upper structure is the one that actually participates in the shearing. max -v·Δt part, and v·Δt≤X≤X of the lower structural surface max This part.

[0076] Therefore, when t = Δt, for the upper structural surface, search for 0≤X≤X max -v·Δt triangular unit; for the lower structural surface, search for v·Δt≤X≤X max The X coordinates of these triangular units are all subtracted by v·Δt, so that the analysis areas of the upper and lower structural surfaces are both located at 0≤X≤X max -v·Δt, where Xmax represents the maximum coordinate in the X-axis direction. For the new shear analysis area, the above-mentioned method for calculating the potential damage degree can be used to obtain the surface morphology of the structural surface at t=2Δt and the potential damage degree between t=Δt and t=2Δt. In step S1, the shear displacement and the shear speed are set. The potential damage degree can be calculated with a time period of Δt. Between t=2Δt and t=3Δt, the calculation method of the potential damage degree is the same as that between t=Δt and t=2Δt. The most important thing is to find the part where the upper and lower structures are in contact with each other. When the structural surface displacement reaches the shear displacement η, that is, t=η / υ, the calculation is stopped, and the sum of the potential damage degrees in each time period is the total potential damage degree.

[0077] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The above is a description of a specific embodiment of this specification. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0078] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for quantifying the potential damage degree of a structural surface based on the wear volume of micro-asperities, characterized in that: The method includes: Obtain the point cloud data of the rock structure surface, calculate the distance from each point on the structure surface to the left side, front side and bottom surface, and define it as new X, Y and Z coordinates, reconstruct and homogenize the three-dimensional structure surface coordinates, and construct a three-dimensional surface composed of triangular units based on the processed point cloud data; For any triangular unit, obtain its shear direction vector, the projection vector of the external normal of the triangular unit on the shear plane, and the geometric inclination angle of the triangular unit; Calculating a first angle corresponding to the triangular unit using the shear direction vector and the projection vector; Calculate the apparent inclination angle of the triangular unit based on the first angle and the geometric inclination angle of the triangular unit; Acquire the protrusion height of the triangular unit according to the coordinates of the three end points of the triangular unit; Screen out potential damaged triangle units according to the visual inclination angles and protrusion heights of all triangle units; The visual inclination angle of the potential damaged triangle unit is reduced by a set angle to obtain a first deformed damaged triangle unit; The protrusion height of the first deformed and damaged triangle unit is reduced by a set distance to obtain a second deformed and damaged triangle unit; Calculating a potential damage volume based on the potential damage triangle unit and its corresponding second deformed damage triangle unit; The sum of the potential damage volumes corresponding to each potential damage triangle unit is the potential damage degree; The method of screening out potentially damaged triangular units according to the visual inclination angles and protrusion heights of all triangular units includes: The maximum viewing angle and the maximum protrusion height of the viewing angles and the protrusion heights of all the triangular units are obtained; based on the maximum viewing angle and the maximum protrusion height, a viewing angle critical value and a protrusion height critical value are respectively obtained; a triangular unit whose viewing angle is greater than or equal to the viewing angle critical value and whose protrusion height is greater than or equal to the protrusion height critical value is a potentially damaged triangular unit; The step of reducing the visual inclination angle of the potential damaged triangle unit by a set angle to obtain a first deformed damaged triangle unit comprises: Ensure that the two end points of the base of the potential damage triangle unit remain unchanged, change the end points in the Z-axis direction, until the viewing angle of the potential damage triangle unit is reduced by a set angle, and obtain a first deformed damaged triangle unit; calculate and obtain the set angle based on the viewing angle of the potential damage triangle unit and the viewing angle critical value; The step of reducing the protrusion height of the first deformed damaged triangle unit by a set distance to obtain a second deformed damaged triangle unit comprises: The three endpoints of the first deformed damaged triangle unit are lowered at equal distances, and when the lowered distance reaches a set distance, a second deformed damaged triangle unit is obtained; the set distance is obtained by calculating based on the protrusion height of the potential damaged triangle unit and the protrusion height critical value.

2. The method for quantifying the potential damage degree of a structural surface based on micro-asperity wear volume according to claim 1 is characterized in that: The first angle corresponding to the triangular unit is: Where α represents the first angle; cos -1 Represents the inverse function of the cosine function; represents the shear direction vector; Represents the projection vector of the triangle element's external normal onto the clipping plane.

3. The method for quantifying the potential damage degree of a structural surface based on micro-asperity wear volume according to claim 1 is characterized in that: The viewing angle is: i * =tan -1 (-tan(θ)·cos(α)), Among them, θ * Indicates the visual inclination angle; tan -1 represents the inverse function of the tangent function; α represents the first angle; θ represents the geometric inclination angle of the triangular unit.

4. The method for quantifying the potential damage degree of a structural surface based on micro-asperity wear volume according to claim 1, characterized in that: The step of obtaining the protrusion height of the triangular unit according to the coordinates of the three endpoints of the triangular unit comprises: The absolute value of the sum of the Z-axis coordinates of the three endpoints of the triangular unit is obtained, and the average is calculated to obtain the protrusion height.

5. The method for quantifying the potential damage degree of a structural surface based on micro-asperity wear volume according to claim 1, characterized in that: The calculating of the potential damage volume based on the potential damage triangle unit and its corresponding second deformed damage triangle unit includes: The potential damage triangle unit and its corresponding second deformation damage triangle unit form a pentahedron, and the volume of the pentahedron is calculated to obtain the potential damage volume.

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