Title:
RANDOM STRESS LOAD SPECTRUM GRADING METHOD AND SYSTEM BASED ON SN CURVE, AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2023/077704
Kind Code:
A1
Abstract:
Disclosed in the present invention is a random stress load spectrum grading method based on an SN curve. The method comprises: compiling counting statistics on a random stress load spectrum of time history, so as to obtain a two-dimensional stress spectrum having mean values and amplitudes; selecting the ultimate strength of a material to execute correction, and making the two-dimensional stress spectrum equivalent to a one-dimensional stress spectrum with a specified mean value; obtaining the fatigue life of a first grade on the basis of the maximum stress amplitude in the equivalent one-dimensional stress spectrum with the specified mean value, and an S-N curve of the material, and determining a fatigue life which corresponds to each of the other grades; reversely deducing stress amplitudes on the basis of the fatigue life and the SN curve, so as to obtain a stress amplitude of each grade; and dividing the stress amplitudes in the one-dimensional stress spectrum and frequencies into corresponding different grades, and compiling statistics on the frequency of the stress amplitude of each grade, thereby completing the grading of a random stress load spectrum. Further disclosed in the present invention are a random stress load spectrum grading system based on an SN curve and used in calculations of loads of various vehicle chassis, and a computer-readable storage medium.
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Inventors:
WANG YOUZHI (CN)
CHENG PINPIN (CN)
SUN XIUBING (CN)
FU JINGYAN (CN)
CHENG PINPIN (CN)
SUN XIUBING (CN)
FU JINGYAN (CN)
Application Number:
PCT/CN2022/079873
Publication Date:
May 11, 2023
Filing Date:
March 09, 2022
Export Citation:
Assignee:
SHANGHAI HEKE TECH CO LTD (CN)
International Classes:
G06F30/15; G06F30/17; G06F30/20; G06F119/04; G06F119/14
Foreign References:
| CN113987684A | 2022-01-28 | |||
| CN110147624A | 2019-08-20 | |||
| CN107609235A | 2018-01-19 | |||
| CN106886638A | 2017-06-23 |
Other References:
DONG, GUOJIANG ET AL.: "Fatigue Analysis of Automobile Steering Knuckle Considering the Effect of Low Load Strengthening", AUTOMOTIVE ENGINEERING, vol. 42, no. 3, 25 March 2020 (2020-03-25), XP009546022, ISSN: 1000-680X
LIN, HAO ET AL.: "The structural strength study of the rotary drilling rig'mast based on the simulation analysis and dynamic stress test", MODERN MANUFACTURING ENGINEERING, no. 11, 18 November 2015 (2015-11-18), XP009545995, ISSN: 1671-3133
LIN, HAO ET AL.: "The structural strength study of the rotary drilling rig'mast based on the simulation analysis and dynamic stress test", MODERN MANUFACTURING ENGINEERING, no. 11, 18 November 2015 (2015-11-18), XP009545995, ISSN: 1671-3133
Attorney, Agent or Firm:
DING & ASSOCIATES PATENT TRADEMARK & LAW (CN)
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