Modeling Method for Fatigue Test of Rail Vehicle Low Temperature Sensitive Components

Abstract

The invention relates to a fatigue test modeling method for cryogenic sensitive components of rail vehicles used for low temperature fatigue test of rail vehicles. Firstly, the temperature circle mathematical model and the temperature grade model of the fatigue test of the cryogenic sensitive components of the rail vehicle are established. Combining the temperature circle model with the temperature grade model, a time proportion model under different temperature grades are established. At last, the fatigue test model of rail vehicle cryogenic sensitive components under different temperature grades is established by combining the temperature circle model, temperature grade model and time proportion model under different temperature grades, and the fatigue test times under different temperature grades are calculated. The invention effectively combines the environmental historical temperature with the low-temperature test of the rail vehicle, and solves the problems that the low-temperature service life of the low-temperature components of the rail vehicle cannot be effectively evaluated and how to carry out the low-temperature fatigue test can effectively check whether the low-temperature service life meets the actual needs.

Description

technical field [0001] The invention belongs to the technical field of low-temperature fatigue tests of rail vehicles, and in particular relates to a modeling method for fatigue tests of low-temperature sensitive components of rail vehicles. Background technique [0002] Some components of rail vehicles, especially the external or under-vehicle parts of the braking system, need to undergo fatigue tests in low temperature environments. This not only ensures their basic functions and functional performance at low temperatures, but also ensures that they have sufficient lifespan. Although some components can meet the life requirements at room temperature, the fatigue life will be significantly reduced in low temperature environment. Insufficient low-temperature life reserve may cause functional failure during continuous operation in a low-temperature environment, which will not only seriously disturb the traffic order, but even pose a threat to traffic safety. stress test. ...

AI Technical Summary

Problems solved by technology

At present, there is no research standard and processing method for effectively combining environmental temperature data with component fatigue test research

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