Prediction method and device for service life of high-speed railway gearbox casing structure

A technology of gear box and prediction method, applied in the field of fatigue strength, can solve problems such as difficult fatigue life, and achieve the effect of improving accuracy

Inactive Publication Date: 2019-09-17
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method and device for predicting the structural life of a high-speed rail gear box, so as to solve the problem existing in the prior art that it is difficult to complete the prediction of the fatigue life within a feasible time

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  • Prediction method and device for service life of high-speed railway gearbox casing structure
  • Prediction method and device for service life of high-speed railway gearbox casing structure
  • Prediction method and device for service life of high-speed railway gearbox casing structure

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Embodiment 1

[0044] like figure 1 As shown, the prediction method for the structural life of the high-speed rail gear box provided by the embodiment of the present invention includes:

[0045] S101, establishing the SN curve model of the gear case material, wherein, N represents the allowable number of cycles of the gear case structure, and S represents the equivalent stress;

[0046] S102, according to the established SN curve model of the gear box material and the equivalent stress of the gear box obtained by random vibration analysis of the gear box structure, determine the allowable number of cycles of the gear box structure under different equivalent stress conditions;

[0047] S103. Predict the fatigue life of the gearbox structure by using the three-interval method and the linear cumulative damage rule according to the determined permissible cycle times of the gearbox structure under different equivalent stress conditions.

[0048]The method for predicting the life of the high-spee...

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Abstract

The invention provides a prediction method and device for service life of a high-speed railway gearbox casing structure, which can be used for predicting the service life of the high-speed railway gearbox casing structure. The method comprises the following steps of establishing an SN curve model of a gearbox casing material; determining the permission cycle times of the gearbox casing structure under different equivalent stress conditions according to the established SN curve model of the gearbox casing material and gearbox casing equivalent stress obtained by performing random vibration analysis on the gearbox casing structure; and predicting the fatigue life of the gearbox casing structure according to the determined permission cycle times of the gearbox casing structure under different equivalent stress conditions by using a three-section method and a linear accumulative damage rule. The prediction method and device in the invention relate to the field of fatigue strength.

Description

technical field [0001] The invention relates to the field of fatigue strength, in particular to a method and device for predicting the structural life of a high-speed rail gear case. Background technique [0002] The phenomenon of fatigue damage often brings catastrophic consequences to people, so it is of great significance to carry out fatigue analysis on structures. According to statistics, 50% to 90% of mechanical equipment or structure damage is related to fatigue. Today, with the vigorous development of high-speed railways, in order to make the operation of high-speed railways safer, we have to pay attention to the quality of high-speed railways, which makes the research on the fatigue life of car bodies particularly important. [0003] During the service of the high-speed train, the gearbox body is a key component of the high-speed train, and it is subjected to various loads during the operation of the high-speed train. These loads make the gearbox body susceptible t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/025
CPCG01M13/025
Inventor 艾轶博张卫冬钱宇浛屈旭徐月
Owner UNIV OF SCI & TECH BEIJING
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