Reliability analysis method of mechanical component structure

A technology of mechanical parts and analysis methods, applied in computer-aided design, instruments, geometric CAD, etc., can solve problems such as high reliability, not maximum stress, etc., to achieve the effect of simple form, important engineering value, easy to understand and operate

CN108491627AInactive Publication Date: 2018-09-04NORTHEASTERN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-09-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a reliability analysis method of a mechanical component structure, and relates to the technical field of mechanical component structure analysis. According to the method, firstly, statics analysis is carried out on mechanical components through AsysWorkbench, then Six Sigma Analysis is utilized to carry out DOE to obtain sufficient experiment data, a BP neural network is utilized to fit a maximum stress function, finally, a limit state equation of intensity degradation is constructed on the basis of Schaff's residual intensity theory, and reliability analysis and calculation are carried out to obtain a reliability analysis result of a mechanical component. According to the reliability analysis method of the mechanical component structure provided by the invention, anoperation process is simple, and reliability of calculation more accords with actual needs. The method has very high engineering practice feasibility and effectiveness.
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Description

technical field

[0001] The invention relates to the technical field of structural analysis of mechanical parts, in particular to a reliability analysis method for the structure of mechanical parts. Background technique

[0002] The reliability of mechanical parts usually refers to the ability of mechanical parts to complete the specified functions within the expected use time and the working conditions required by the parts. Stress is an external factor that affects product functions, and the structural reliability of mechanical parts depends to a large extent on the magnitude of stress.

[0003] During the use of mechanical parts, due to the cumulative effect of external factors such as temperature, humidity, corrosion, etc., the strength and stress of mechanical parts will gradually change, resulting in gradual failure. Therefore, the reliability of mechanical parts is time-varying. . In the traditional mechanical reliability design, most of the stress functions are math...

Examples

Embodiment Construction

[0046] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0047] The mechanical part in this embodiment is a hollow circular tube tie rod with a symmetrical structure, and the parameters of the test piece are shown in Table 1, where Q is the load on the tie rod, d 1 The outer diameter of the section, d 0 is the inner diameter of the section, and r is the strength of the tie rod.

[0048] Table 1 Specimen parameters

[0049]

[0050]In order to make the reliability calculation results of mechanical parts under the stress-strength interference model more accurate or closer to reality, the method of this embodiment proposes to use the maximum stress of the static analysis results of AnsysWorkbench finite element software as the...