What is it about?
The paper presents the results of a study on elements of the bogie frame structures of wagons operated in Bulgaria that has been carried out to determine reliability indicators such as failure intensity as well as mathematical expectation. To determine the distribution law of work until failure, failure data of carriage bogie elements are processed by adequate software. Graphs based on a statistical model have been constructed and reliability indicators have been analyzed. The type of distribution law of work (working off) until the passenger bogie frame failure has been determined. Based on the obtained dependences, it is possible to forecast the failure intensity for the respective passenger bogie structure at certain mileage. The discovery of unreliable bogie frame units makes possible to determine the trends of future design, production and technology activities for carriage modernization as well as the need to develop new designs of bogie frames.
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Why is it important?
The paper presents the results of a study on elements of the bogie frame structures of wagons operated in Bulgaria. Based on statistical data, the percentage of damage to the frames of passenger bogies was determined based on operational observations of BDZ Passenger Transport EOOD. Two laws have been established for the distribution of damage to passenger bogies – Weibull and Normal. The density of bogie frame failure probability of type Gorlitz V, VI and modifications and GP200 is distributed according to Weibull law, and for passenger bogie frames T73-AD and Y32 it is distributed according to Weibull and Normal distribution laws. Based on the obtained dependences, it is possible to forecast the failure intensity for the respective passenger bogie structure at certain mileage. The discovery of unreliable bogie frame units of type Gorlitz V, VI and modifications, GP200, T73-AD and Y32 makes possible to determine the trends of future design, production and technology activities for carriage modernization as well as the need to develop new designs of bogie frames.
Perspectives
Writing this article was a great pleasure as it has co-authors with whom I have had long standing collaborations. Based on the obtained dependences, it is possible to forecast the failure intensity for the respective passenger bogie structure at certain mileage. The discovery of unreliable bogie frame units of type Gorlitz V, VI and modifications, GP200, T73-AD and Y32 makes possible to determine the trends of future design, production and technology activities for carriage modernization as well as the need to develop new designs of bogie frames.
prof. DSc Dobrinka Borisova Atmadzhova
Todor Kableshkov University of Transport, Sofia, Bulgaria
Read the Original
This page is a summary of: Study on failure probability of passenger bogie frames, January 2024, American Institute of Physics,
DOI: 10.1063/5.0202440.
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