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Method for analyzing contact property of layered rough surface

A rough surface, contact performance technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as poor precision and low efficiency

Active Publication Date: 2016-09-21
TSINGHUA UNIV
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Problems solved by technology

There are two problems with this idea: first, the accuracy of the fitting method is poor; second, the fitting is often limited by the actual shape of the probability density function
[0004] For the contact performance of the layered rough surface, it is true that the deterministic model can be used to predict, but there is a defect that the efficiency is not high

Method used

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  • Method for analyzing contact property of layered rough surface
  • Method for analyzing contact property of layered rough surface
  • Method for analyzing contact property of layered rough surface

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Embodiment Construction

[0054] Taking the 3D layered rough surface as an example, follow figure 1 The principle flowchart shown in the present invention illustrates the analysis method of the contact performance of the layered rough surface.

[0055] 1) Input the rough surface topography data and the control parameters required for surface analysis, and calculate the overall surface parameters and surface functions of the rough surface:

[0056] a) Rough surface topography data is 3D surface topography z(x,y);

[0057] b) The control parameters are: the cut-off coefficient of the autocorrelation function is 0.2, and the effective interval of the probability material ratio curve is selected as [-3,3];

[0058] c) Dimension L x =L y =360 μm, number of data points in x and y directions M=N=1024, resolution Δ in x and y directions x =Δ y =360μm / (1024-1)=0.352μm;

[0059] d) Using the formula

[0060] σ = 1 M ...

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Abstract

The invention discloses a method for analyzing the contact property of a layered rough surface. The precision and the efficiency for prediction of the contact property of the layered rough surface are increased; control parameters required by morphology data and surface analysis of a 2D / 3D layered rough surface are input; an overall surface parameter and a surface function are calculated; the overall rough surface is separated into two component surfaces by adoption of layering thought; therefore, a surface parameter of any component surface is obtained; the surface parameter of the component surface is utilized for constructing an analytical expression of a rough peak height probability density function in the layered rough surface; therefore, a statistical contact model of the layered rough surface is established, such that the contact property of the layered rough surface is researched; and the method disclosed by the invention is applied to analyzing the contact property of the layered rough surface, and particularly suitable for a multi-process surface (such as the surface of an inner cylinder processed in a fat top honing manner in an automobile engine) and a worn surface.

Description

technical field [0001] The invention relates to a method for analyzing the contact performance of layered rough surfaces, in particular to a rough surface formed under the joint influence of multiple technological processes, which is suitable for multi-process surfaces (for example, internal surfaces processed by flat-top honing in automobile engines) Cylinder surfaces) and wear surfaces. Background technique [0002] Theoretical studies on rough surface contact have been reported, which can be mainly classified into two categories: statistical contact model and deterministic contact model. In terms of statistical contact models, it can be divided into classical models (GW model, CEB model and KE model, etc.) and fractal models (MB model). The statistical model adopts analytical method, which has high efficiency but low precision. With the development of computer calculations, deterministic models are widely used, which adopt numerical methods with high precision but low e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 黄伟峰胡松涛刘向锋刘莹王玉明
Owner TSINGHUA UNIV
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