Structural member reliability evaluation method and system based on finite element simulation

A structural component and reliability technology, applied in the field of product reliability simulation test, can solve problems such as low test efficiency, long development cycle, and difficulty in finding and improving potential defects, so as to reduce test time, reduce development cost, and improve reliability. Evaluate the effect of efficiency

Active Publication Date: 2020-08-25
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional product design is based on manual and safety factors to determine the design scheme. It is difficult to find and improve potential defects in the design stage, and it is almost always resolved by "post-verification".
The data shows that: a design defect, exposed and solved through later tests or user feedback, requires at least 10 times the cost; at the same time, it takes a long time for test verification to draw a conclusion, the test efficiency is low, and the product development cycle is long. The above problems Therefore, a reliability evaluation method and system for structural parts based on finite element simulation are proposed

Method used

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  • Structural member reliability evaluation method and system based on finite element simulation
  • Structural member reliability evaluation method and system based on finite element simulation
  • Structural member reliability evaluation method and system based on finite element simulation

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Experimental program
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Embodiment 1

[0055] This embodiment provides a technical solution: a method for evaluating the reliability of structural parts based on finite element simulation, including the following steps:

[0056] S1: Building a structural model

[0057] Build digital prototype models of structural components.

[0058] S2: Determine the simulation environment parameters

[0059] Preliminarily determine the environmental parameters and load conditions of the simulation process.

[0060] S3: Perform finite element simulation

[0061] Input the digital prototype model of the structural part and the determined simulation environment parameters to carry out the finite element simulation.

[0062] S4: Determining the characteristics of the failure data of the structural member

[0063] According to the environmental parameters of the structural parts, combined with the failure mode, impact and hazard analysis report of the structural parts, and the finite element analysis data, the potential failure posi...

Embodiment 2

[0098] Such as figure 1 As shown, this embodiment provides a reliability analysis method for structural parts based on finite element simulation, and the steps of the reliability simulation test for structural parts are as follows:

[0099] 1) Constructing a digital prototype model of the structural part. The digital prototype model refers to a two-dimensional or three-dimensional digital prototype model. In this embodiment, the structural part here is a radar structural part.

[0100] 2) To preliminarily determine the environmental parameters of the simulation, etc., for the simulation of a radar structural part in the environment of gravity acceleration, the normal distribution is used to generate random environmental parameters, and the normal distribution parameters are shown in Table 1.

[0101] Environmental parameter setting table in the present embodiment of table 1

[0102]

[0103] 3), input the digital prototype model, environmental parameters, etc., and start t...

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Abstract

The invention discloses a structural member reliability evaluation method and system based on finite element simulation, and belongs to the technical field of product reliability simulation tests, andthe method comprises the following steps: S1, constructing a structural member model; s2, determining simulation environment parameters; s3, performing finite element simulation; s4, determining fault data characteristics of the structural member; s5, constructing a reliability analysis model; s6, evaluating the reliability of the structural member; s7, determining the reliability under a given threshold value; and S8, judging whether an analysis result meets expectation or not. In the step S1, the digital prototype model refers to a two-dimensional or three-dimensional digital prototype model. In the step S2, the environmental parameters of the simulation process are preliminarily determined, and the load conditions comprise determination of distribution types obeyed by the environmentalparameters, determination of specific parameter values and determination of the load conditions. Structural part design defects can be exposed as soon as possible, the structural part reliability test time is shortened, the reliability evaluation efficiency is improved, the product development period is shortened, and the development cost is reduced.

Description

technical field [0001] The invention relates to the technical field of product reliability simulation tests, in particular to a reliability evaluation method for structural parts based on finite element simulation. Background technique [0002] With the continuous advancement of science and technology, engineering equipment such as wind turbines, CNC machine tools, and construction machinery are gradually developing towards flexibility, precision, and intelligence. Once this kind of complex equipment system fails or its health status deteriorates, it will often bring huge economic losses to users or related enterprises, and even cause catastrophic consequences. [0003] Therefore, in the face of increasingly demanding customer requirements and the pressure of market competition, developers are investing more and more energy and cost in improving product reliability while meeting product function / performance design. However, highly reliable products cannot be obtained out of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06F30/23G06F119/02
CPCG06F30/17G06F30/23G06F2119/02
Inventor 田富君张红旗陈兴玉周红桥郭磊周金文陈亮希魏一雄张燕龙苏建军
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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