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

A fatigue test and rail vehicle technology, applied in the field of fatigue test modeling of low temperature sensitive components of rail vehicles, to achieve reasonable assumptions and a wide range of effects

Active Publication Date: 2020-01-07
CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Embodiment Construction

[0025] Specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0026] The invention provides a fatigue test modeling method for low-temperature sensitive components of a rail vehicle, which can be applied to the fatigue test of low-temperature sensitive components of a rail vehicle. According to the periodicity and slowness of natural temperature changes in different test areas, this method uses the internal correlation of various temperature data to determine the number of fatigue tests that need to be carried out in different test temperature ranges, and to determine the low temperature sensitive components of rail vehicles. The low temperature life that the test area should have.

[0027] combine figure 1 , figure 2 As shown, a fatigue test modeling method for rail vehicle low temperature sensitive components includes the following steps:

[0028] (1) Establish the mathematical model of the temperatu...

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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. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15G06F119/04G06F119/08
CPCG06F30/15G06F2119/04G06F2119/08
Inventor 宋传云李祥瑞杨帆陈海刁有彬王超恒孔德鹏王震徐少亭黄士伟
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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