Afanas’kov P. M. Nesushchaya sposobnost' kuzova vagona-samosvala dlya perevozki sypuchikh gruzov posle dlitel'noy ekspluatatsii [Carrying capacity of the dump car body to transport bulk cargo after prolonged operation]. Sovremennye tekhnologii. Sistemnyi analiz. Modelirovanie [Modern Technologies. System Analysis. Modeling], 2020, No. 4 (68), pp. 202–210. – DOI: 10.26731/1813-9108.2020.4(68).202-210
10.26731/1813-9108.2020.4(68).202-210
The article highlights the problem of the formation of a shortage of specialized rolling stock on the territory of the Republic of Belarus and the ways of solving this problem. It describes the design features of the lower and upper frame of dump car models 31-638, 31-656 and 31-661, established during the study of design documentation. The specificity of the operation of cars of this type is considered. An approach to assessing the residual life of dump cars after long-term operation is proposed, taking into account the main physical and mechanical characteristics of the metal and the specifics of the operational loads of a car of this type. The schemes of inspection of the technical condition of the supporting structure of dump cars by the method of ultrasonic thickness gauge are presented. A survey of 186 dump cars was carried out by non-destructive testing methods: visual inspection and ultrasonic thickness measurement. The paper describes the zones of the upper and lower frame of a dump car, established by means of technical diagnostics, which are prone to the formation of defects to a greater extent. It considers the standard modes of loading the body structure of a dump car. The calculation of the bearing metal structure of a dump car was carried out taking into account the real physical state of the metal structure of the body of the selected typical representative, which is in the worst technical condition. A detailed analysis of the stress-strain state of the body structure of a dump car is presented. Based on the simulation results, a scheme for applying strain gauges was developed to carry out field tests of the car. The scope of full-scale control tests (including loading modes characteristic of the specific operation of cars of this type), which will be subjected to a selected typical representative of a dump car with the worst technical condition and local corrosive wear, is described.
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