# Determination of the Loading of a Flat Rack Container during Operating Modes
## 2 Analysis of Literature Data and Problem Statement
It is important to note that the study of the dynamic load of containers in these works is not carried out, and the determination of strength is carried out taking into account the normative values of loads. In addition, the authors have not proposed measures to improve the efficiency of operation of the proposed container designs. The study of dynamic loads acting on a tank container placed on a flat wagon during a shunting collision is provided in [16]. The interaction of the tank container with the platform wagon was simulated by an elastic-dissipative connection at a longitudinal load from a 2200-2800 kN striking wagon. The choice of the parameters of the shock-absorbing device was carried out for the case when the gaps between the fittings and the fitting stops are maximum, and there is no movement of the fluid cargo. The given model takes into account the presence of three degrees of freedom of the container. The maximum value of the longitudinal impact force that can act on a flat car with a load placed on it, including containers, during a shunting collision, is 3.5 MN [17; 18]. Therefore, in order to obtain an updated value of the accelerations acting on the container in operation, it is necessary to conduct additional research. Determination of the dynamic loading of the container under operating conditions was carried out in [19]. The obtained values of dynamic loads were taken into account when calculating the container strength in the environment of the Ansys software package. The study of the supporting structure strength of the container under operating conditions of loading is carried out in the publication [20]. The paper analyzes the effect of the density of the finite element model on the accuracy of calculating the stress-strain state of the container and also conducts field studies of its strength under shock loads. It is important to say that measures to improve the load-bearing constructions of containers in order to reduce their dynamic loading have not been proposed in the works under consideration. Paper [21] analyzes the requirements for the design of containers and ISO standards, the identified problems and inconsistencies between the rules and standards, as well as their impact on the safety of containers operation. A review of the main problems of the railway vehicles operation related to traffic safety is carried out in [22]. The main criteria used in assessing the safety of vehicle traffic in accordance with the standards of different countries are considered. At the same time, the issues of improving containers to reduce their dynamic loading and ensure operational safety are not considered in these works. The design features of a container made of composite material are covered in [23]. The given results of calculations for the strength of the container under the main operating conditions of the load. However, the work does not provide studies of the dynamic loading of the container under the main operating conditions. The work [24], where a method of eco-design of structural elements of vehicles is proposed, is of scientific interest. The features of the application of this method are highlighted. At the same time, the work does not pay attention to the issues of increasing the efficiency of the operation of vehicles, including containers, taking into account the application of the proposed method. In work [25], the design loads on containers under operating conditions are determined. The requirements for the safe operation of containers are indicated. The specifics of designing containers for the transportation of long cargo are covered in [26]. An example of calculating the strength of a container when loading it with round pipes is given. The calculation results confirmed the feasibility of the structural solutions adopted in the design. Determination of the dynamic loading of the flat car with containers is carried out in [27]. A model is proposed that allows one to take into account the movement of the container under the longitudinal loading of the flat car.