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Gear drive reliability assessment method based on Kriging model

A gear transmission and reliability technology, applied in CAD numerical modeling, special data processing applications, instruments, etc., can solve the problems of less research on reliability evaluation, and achieve the effect of reducing the number of tests and the amount of calculation

Inactive Publication Date: 2017-10-20
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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Problems solved by technology

At present, there are few domestic studies on the reliability evaluation of gear transmission based on the Kriging model.

Method used

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  • Gear drive reliability assessment method based on Kriging model
  • Gear drive reliability assessment method based on Kriging model
  • Gear drive reliability assessment method based on Kriging model

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Embodiment Construction

[0034] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0035] The technical scheme of the present invention is as figure 1 Shown; a gear transmission reliability assessment method based on the Kriging model, including the following steps:

[0036] S1: Establish the function function of the gear transmission structure, and determine the random variable S=[x in the function 1 ,x 2 ,...,x n ] T and distribution type.

[0037] The structure function function is:

[0038] G(x)=D 0 -D(x) (1)

[0039] Among them, D 0 Structural strength, D(x) structural stress; the structure function function here can also be approximated by the existing Kriging model to simplify the calculation.

[0040] The distribution types of each random variable are obtained through data collection and hypothesis testing.

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Abstract

The invention discloses a gear drive reliability assessment method based on a Kriging model and is applied to the field of reliability assessment. According to the gear drive reliability assessment method, the Kriging model is established firstly according to an initial sample, then whether variable coefficients meet the requirements or not is judged according to the established Kriging model, new variable coefficients are recalculated in a sample point adding mode. The stress calculation quantity based on a finite element method in a traditional method is greatly decreased. The gear drive reliability assessment method adopts a Monte Carlo method to calculate the structural reliability, and meanwhile combines with a learning function to obtain a high-precision agent model with fewer sample points, and accordingly testing times are decreased.

Description

technical field [0001] The invention belongs to the field of gear transmission reliability evaluation, in particular to a gear transmission reliability evaluation technology. Background technique [0002] Gear transmission is widely used in industrial production and daily life, such as automobiles, wind power generation, machine tools, aerospace and other fields. In the actual application process, due to the influence of various external factors, the gear failure forms are various, such as tooth surface pitting, tooth surface wear, tooth fracture, tooth surface gluing and plastic deformation. At present, mechanical products are developing towards high reliability. If reliability research is not carried out for these failure mechanisms, the products will inevitably lose their competitiveness. [0003] The reliability calculation of gear transmission is mainly to solve the structural strength and stress (such as contact stress and bending stress) by constructing the structura...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23G06F2111/10
Inventor 黄洪钟钱正坤黄土地李彦锋付国忠米金华郭骏宇
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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