Abstract
Among the running faults of railway freight cars, wheelset faults still occupy a very large proportion in all operation faults. These faults seriously affect and threaten the operation safety of railway freight cars. Focusing on the data of the operating mileage of C80 wheelset, application of the two-parameter Birnbaunm-Saunders (BS) fatigue life distribution and the Weibull distribution are introduced and reviewed for analyzing the data of three high-risk wheelset faults, namely the wheel diameter difference, the circumferential wear of the tread and the location depression of tread. The analysis results show that the application of BS fatigue life distribution in the prediction of wheelset reliability is feasible.
Highlights
As for the railway freight car, the operational safety is commonly affected by the reliability of the wheelset
The failure of wheelset frequently occurred during the train in service, such as wheel diameter difference, the circumferential wear of the tread, and the location depression of tread [1]
This paper selects the wheelset of C80 heavy-haul freight car owned by one railway company as a case study, which contained the unit running miles.As can be seen from the statistical Table 1 of C80 train wheelset maintenance, among the 15354 inspected wheelsets, there are 5346 wheel diameter difference exceeded, 4896 tread wear exceeded, 4292 local tread depression, and rim thickness over limit 228, with 586 tread stripping
Summary
As for the railway freight car, the operational safety is commonly affected by the reliability of the wheelset. To investigate the wearing mechanism of wheelset, different methodologies have been studied to predict the wear of railway wheelset in recent years, especially in the rolling contact fatigue [3,4,5]. There are few studies about the rule of failure from the relationship between the frequency of wheelset depot-repair and its operating mileage. The contribution of this work is to analyze the depot-repair data of wheelset by comparing the Weibull distribution and BS distribution, which applies the BS distribution to the field of wheelset failures while simultaneously considering the relationship between wheel damage and operating mileage. RELIABILITY ANALYSIS OF RAILWAY FREIGHT CAR WHEELSET BASED ON BIRNBAUNM-SAUNDERS FATIGUE LIFE DISTRIBUTION.
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