Method for solving insufficient failure data in service life analysis and prediction of high-speed rail gearbox body

Abstract

The invention discloses a method for solving insufficient failure data in service life analysis and prediction of a high-speed rail gearbox body. The method comprises the following steps: firstly, carrying out finite element analysis on the high-speed rail gear box body by utilizing a finite element simulation technology; secondly, analyzing the distribution law of the fatigue life of the gear boxbody material by utilizing the result of the rotary bending fatigue test of the gear box body material, carrying out parameter estimation, and establishing an SN curve model of the gear box body material; and finally, analyzing and predicting the service life of the gearbox body by combining the finite element simulation data of the gearbox body and the fatigue test data of the material. According to the invention, the high-speed rail gear box body is large; Load complexity, a structure with a long service period is an object; Aiming at the problem of insufficient failure data of the high-speed rail gear box body, the invention provides a method for solving the problem of insufficient failure data in the life analysis and prediction of the high-speed rail gear box body from the perspective of cross-scale, thereby laying a foundation for further predicting the fatigue life of the gear box body and providing a new research method for the fatigue life analysis of such structural parts.

Description

Technical field [0001] The invention belongs to the technical field of fatigue life analysis and prediction for large-scale, complex-loaded, and long-service-period structural parts, and specifically relates to a method for solving insufficient failure data in the life analysis and prediction of high-speed rail gearboxes. Background technique [0002] The fatigue failure phenomenon often brings catastrophic consequences to people, so it is of great significance to carry out fatigue analysis on the structure. According to statistics, 50% to 90% of damage to mechanical equipment or structures is related to fatigue. With the vigorous development of high-speed railways today, in order to make the operation of high-speed railways safer, it is necessary to pay attention to the quality of the use of high-speed railways, which makes the research on the fatigue life of car bodies particularly important. With the continuous improvement of the reliability level, life evaluation is facing t...

AI Technical Summary

Problems solved by technology

Once the gearbox fails, it will have the most direct impact on the reliable operation of the entire mechanical equipment

As far as the high-speed railway is concerned, if the gearbox of the high-speed railway fails during driving, it will pose a great threat to the safety of the people in the vehicle.

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