Standard rated schemes for a gondola car are considered at the calculation of loading in a car dumper. There are offered refined rated schemes taking into account frozen load unloading at car turning of 90º and a buffer stop displacement of the car dumper. It is shown that the supposed rated schemes allow re-vealing the stress increase in an upper framing as compared with standard rated schemes.

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A simplified method has been developed for assessing the loading of the load-bearing systems of passenger cars under thermal loading with a fire spot with limited properties. A system of simplifications for realizing a combustion spot is substantiated. A method for its implementation is proposed. The description of the object of research is given with the necessary thoroughness of presentation. A finite element scheme has been developed and adapted, taking into account the application of thermal loads in the system of an industrial software complex that implements the finite element method. Verification of the finite element scheme was carried out taking into account full-scale normative experiments. A conclusion is made about the possibility of the applicability of the finite element scheme for the study. Numerical experiments have been carried out to assess the carrying capacity of the body of a double-deck passenger car when it is exposed to a combustion center with known thermal parameters. The experiments were built and performed in a finite element method system. The results of simulations in the affected zone of the alleged fire were obtained for the conditional spot of its location. Comparison of the results with the static loading mode of the car body is considered. The analysis of the results obtained is carried out. A conclusion is given on the effect of a small localization fire on the carrying capacity of the car body. The proposed method is evaluated taking into account the possibility of further use

Methods for restoring coal flowability are considered and some of them are accentuated. The results of the analysis of load-carrying structures of low-sided cars when exposed to thermal methods of restoring coal flowability are presented. The study was conducted using the industrial FEM software complex. The assessment was carried out for two typical low-sided car structures - with a solid floor and hatches on the frame. Studies have shown that thermal loading significantly affects the low-sided car supporting structures and should be taken into consideration when designing cars of enhanced performance properties. The main low-sided car design feature, considered in the paper, is the presence or absence of load-bearing flooring with longitudinal reinforcements. The presence of a carrier floor in the body reduces the load level of the lower trim in its average section. When comparing the loading of both types of bodies, it can be seen that the backward body of the low-sided car perceives loads, both power and thermal, better. According to the results of the calculations, it is possible to say about the priority of the use of infrared irradiation, as a scheme for restoring the flowability by the criterion of minimizing the thermal loading of the supporting systems of the low-sided cars.