Keywords: transport mechanics, open wagon, dynamic load, combined transportation, strength analysis, structure loading.

In this paper a study of the possibility of using open wagons for the transportation of tracked vehicles is presented. At the initial stage, the author's team carried out mathematical modelling of the longitudinal load of an open wagon when transporting tracked equipment in it. The option of fixing it in an open wagon through fastening brackets is considered. The determined acceleration is considered when calculating the strength of the open wagon body. It was established that the stresses in the body of the open wagon are almost 30% higher than permissible. Therefore, the transportation of tracked machinery according to such a scheme is inadmissible. In this regard, the concept of a removable module for attaching tracked equipment in an open wagon is proposed. This concept is a frame that works as an intermediate adapter between the open wagon body and the tracked transport unit. The peculiarities of determining the performance profile of the removable module, as well as its strength calculation under static and dynamic loads, are highlighted. The results of these calculations proved that the strength of the removable module under the considered operating load schemes is ensured. Mathematical modelling of its vertical load was carried out to evaluate the dynamics of the open wagon, considering the proposed technical solutions for securing the tracked machinery. The results of the calculation showed that the movement of the open wagon is rated as "excellent". The conducted research will contribute to the improvement of the efficiency of railway transport operation and will be useful developments in the design of modern concepts of removable modules of multifunctional purpose.

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