Horizontal dynamic reliability ground evaluating method for railway truck

Abstract

The invention discloses a horizontal dynamic reliability ground evaluating method for a railway truck, comprising the following steps: A. collecting enough horizontal dynamic ground monitoring data of some type of trucks, including truck numbers, time and horizontal dynamic performance ground monitoring data; B. collecting the periodical examination information of the type of trucks; C. matching the horizontal dynamic ground monitoring data and periodical examination information of the type of trucks according to the truck numbers to obtain the horizontal dynamic ground monitoring data and the corresponding application time after periodical examination of each truck at a time; D. respectively performing horizontal dynamic performance invalidation evaluation to each collected application time after periodical examination of the each truck according to the horizontal dynamic ground monitoring data to obtain a horizontal dynamic performance reliability sample of the type of trucks; and E. performing reliability evaluation to the type of trucks by the horizontal dynamic performance reliability sample of the type of trucks.

Description

technical field [0001] The invention relates to a ground evaluation method for the lateral dynamics reliability of railway freight cars. Background technique [0002] A railway freight car is a typical mechanical system, and there are many friction parts between various components. In use, the lateral dynamics of a truck is affected by many factors, such as the running-in of components, the shape change of the wheel tread, the wear of components such as saddles, wedges, and center discs, which make the lateral dynamics of the truck change during the service cycle Larger, must use the reliability method to carry on the study to the lateral dynamic performance of the truck. [0003] China Railway has a profound lesson in this respect: the type test shows that the Zhuan 8A bogie, which can meet the needs of 100km / h operation, after a large number of installations, the actual running speed of empty cars can only be limited to below 70km / h. The reliability of the academic perfo...

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Problems solved by technology

[0004] The traditional means of evaluating the lateral dynamics performance of trucks is the on-board dynamics test, which is difficult to study the reliability of the lateral dynamics performance, because obtaining a sufficient number of samples of the reliability of the lateral dynamics performance and using the traditional on-board dynamics method requires a large number of Money, manpower and time

For example, the reliability test of speed-increasing freight cars on the circular line is the first and only freight train reliability test in China. From 2003 to 2007, a reliability test with a maximum mileage of 360,000 kilometers was carried out on the circular line of the China Academy of Railway Sciences. The test cost A lot of financial resources and manpower have achieved important results, but in terms of the reliability evaluation of lateral dynamic performance, the results have relatively large limitations, which are mainly reflected in two aspects. First, there are too few reliability samples, and the There are only 84 trucks in total; second, the operating conditions of the reliability test are very different from the actual operating conditions. For example, the loading state of the vehicle remains unchanged in the reliability test, but the empty and heavy states of the truck are alternated in the actual operation process; The line conditions and irregularities of the circular road are not widely representative compared with the actual operating lines, so the reliability test of the circular road has spent a lot of manpower, financial resources, and time. Only under the test conditions that are quite different from the actual operating conditions, A small number of lateral dynamic reliability samples have been obtained, and the reliability evaluation results have relatively large limitations

[0005] In short, it is difficult to carry out the reliability evaluation of lateral dynamic performance by using the traditional vehicle-mounted dynamic evaluation method. The number of samples is small, the loading conditions do not match the actual conditions, and the cost is high, so it is impossible to obtain enough samples for lateral dynamic reliability analysis. , therefore, the reliability evaluation of the lateral dynamics of trucks is still blank in the world

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