Open AccessWays to improve the mathematical model of a freight car for the execution of forensic railway-transport expertises
Author(s) -
Andriy Batig,
Andriy Kuzyshyn,
J. Sobolevska,
Andriy R. Milyanych,
Petro Hrytsyshyn
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/985/1/012008
Subject(s) - derailment , stock (firearms) , computer science , transport engineering , mathematical model , passenger transport , rail freight transport , track (disk drive) , operations research , engineering , mathematics , statistics , mechanical engineering , operating system
According to statistics, receipts of forensic railway-transport expertises related to the derailment of freight wagons annually grows. At the same time, an analysis of the available mathematical models of freight wagons for the study of such cases showed that at present they are not sufficiently detailed to the extent that it is necessary to analyze the causes of rolling stock derailment. Therefore, taking into account the main reasons that occurrence of such railway accidents over the last five years on the railways of Ukraine, the article selects the main directions for improving the mathematical model of a freight wagon. These directions, in turn, should cover the whole plural of factors (explicit and hidden) and identify the most significant ones regarding the circumstances of the derailment rolling stock off the track, established on the basis of a computer experiment. An algorithm and a mathematical model are proposed taken into account the influence on the dynamics of the wagon of process of closing gaps in the axle-boxes and slides, and the equations of motion of the wheelset are supplemented by a guiding force, whose value is one of the main indicators of the stability of the rolling stock.