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Structural member residual strength assessment method based on multi-factor fusion correction

A structural component and multi-factor technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of single consideration factors and low prediction accuracy, and achieve the effect of solving single consideration factors and improving the accuracy of evaluation results

Active Publication Date: 2017-06-13
南京市特种设备安全监督检验研究院 +1
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing residual strength prediction method has single consideration factors and low prediction accuracy

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  • Structural member residual strength assessment method based on multi-factor fusion correction
  • Structural member residual strength assessment method based on multi-factor fusion correction
  • Structural member residual strength assessment method based on multi-factor fusion correction

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] A method for assessing the residual strength of structural members based on multi-factor fusion correction, comprising the following steps:

[0019] S1. Determine the most likely fracture position, the maximum stress value, and the stress state distribution near the maximum stress position of the structural part to be tested, specifically: use pro-e software to establish a three-dimensional model of the structural part to be tested, and import the established three-dimensional model In the ANSYS finite element analysis software, the 3D model is meshed according to the tetrahedral grid, fixed constraint settings are imposed on the fixed connection positions of the structural parts to be tested, and loads are applied to the model according to the loads of the empirical working conditions. After the pre-analysis processing is completed, analyze its ...

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Abstract

The invention provides a structural member residual strength assessment method based on multi-factor fusion correction. The method includes the following steps that finite element software is used for conducting finite element analysis on a to-be-tested structural member, and the most easily broken position, the maximum stress value and stress state distribution near the position with the maximum stress value of the to-be-tested structural member are obtained; a fatigue test is conducted on the to-be-tested structural member, and the fatigue life under the maximum stress value condition is obtained; the real-time stress value of the most easily broken position of the to-be-tested structural member under the actual working condition is measured; a stress concentration correction coefficient is obtained; the dimension correction parameter of the to-be-tested structural member is calculated; the surface quality correction parameter of the to-be-tested structural member is obtained; the residual strength of the to-be-tested structural member is calculated finally. The method takes all factors capable of affecting the damage state of the structural member into account, wherein the factors refer to the fatigue life of the structural member, stress concentration, stress distribution conditions, a manufacturing process, the surface strength and the like; the problem that in the prior art, factors taken into account are singular is effectively solved, and the accuracy of an assessment result is greatly improved.

Description

technical field [0001] The invention relates to a method for assessing the remaining strength of structural parts based on multi-factor fusion correction. Background technique [0002] With the progress of society, a large number of equipment are developing in the direction of large-scale. Under such a background, small damages will cause huge losses, so it is necessary and urgent to predict and evaluate the remaining strength of equipment or components to grasp their real-time damage status. There are many factors that affect the residual strength of large components, usually including: structural factors, stress ratio, average stress, load type, manufacturing and processing factors, etc. There are many studies on the prediction of component residual strength, but most of them focus on improving the accuracy of residual strength prediction results through the correction of a single factor, so as to realize the accurate evaluation of component operating status, so too few f...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23G06F2119/06
Inventor 冯月贵朱林贾民平胡静波丁树庆王会方罗橙庆光蔚王爽周前飞韩郡业冯文龙
Owner 南京市特种设备安全监督检验研究院
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