A Fatigue Test Method for Railway Freight Car Bogies

Abstract

The invention relates to the machinery field and particularly relates to a freight train truck complete machine fatigue testing method. The freight train truck complete machine fatigue testing method comprises steps of 1) establishing a dynamics model of a tested truck and a typical train body, 2) setting route parameters according to a practical condition of a route, using irregularity of a rail as an excitation input in calculation, 3) performing a dynamics simulation plan on the freight model, 4) obtaining a load-time course of each part of the truck under working conditions of various speed levels of the train, 5) using a rain flow counting method to perform data statistic analysis, and 6) determining load spectrum data which can be used for the related truck. The freight train truck complete machine fatigue testing method provides a new testing method and explores a new field of the freight train truck complete machine fatigue test. The study content of a testing table has perceptiveness and pioneering significance and can improve the test study level and the technology innovation capability of an enterprise.

Description

Technical field [0001] The invention relates to the field of machinery, in particular to a fatigue test method for the complete machine of a railway freight car bogie. Background technique [0002] The bogie is an important part of railway vehicle operation. As the vehicle runs in different sections, the load conditions of the locomotive running components also change from time to time, coupled with the influence of factors such as track irregularities, which make the components bear extremely complex random loads, so bogie components are typical fatigue parts. Relevant domestic and foreign research institutes, railway vehicle development units, and vehicle application departments have all carried out a lot of work on the fatigue research of key bogie components, but there is no definite or unified standard for the fatigue reliability of the bogie. [0003] At this stage, there are static load and fatigue test methods and standards for bogie components, such as bolsters, side fram...

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Problems solved by technology

[0004] However, during the long-term service of the bogie, there are still many problems that we did not consider at the beginning of the design, such as the loosening and falling off of the connecting parts, the shearing of the bolts, the inclination of the side frame, the irregular wear and the resulting Problems such as a sharp drop in vehicle dynamics caused by this problem, and even cracks or even fractures in many parts that have passed the fatigue test verification, these are things that cannot be found by studying the reliability of bogie parts alone

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