Abstract
The use of modern means of mechanization of loading and unloading operations in places of mass processing of bulky loads in railway and water connection allows to increase the efficiency and productivity of various types of transport, to ensure the safety of load and rolling stock. The most common method of unloading open wagons in ports, mining enterprises, thermal power plants, etc. is the use of special rotary car dumpers. However, it should be noted that unloading on the car dumpers leads to damage of the carriages structural elements. The article presents the results of strength calculations of the car dumper body under the influence of specified dynamic loads from the expiring cargo. They show that the safety margin of the load-bearing elements of the car body is not enough at critical corners of rotation of the car dumper rotor. The studies were carried out using modern computer modeling methods used in the development of new-generation freight car designs. The software package took into account the effects of dynamic loading as external factors that occur at different corners of the car dumper rotor. The implementation of the results obtained at the design stage of innovative structures of open wagon car bodies will allow predicting the operational parameters of load-bearing structures. The presented studies are aimed at improving the safety and operational reliability of the cargo car fleet.
Highlights
The use of modern means of mechanization of loading and unloading operations in places of mass processing of bulky loads in railway and water connection allows to increase the efficiency and productivity of various types of transport, to ensure the safety of load and rolling stock
The proposed approach of integrating a mathematical model in order to minimize the turnover time of cargo units by optimizing technological operations in the seaport. This method allows optimal use of the port infrastructure, including car dumpers (Figure 3), for handling freight cars in order to comply with the technology of unloading cargo and ensure the safety of the car fleet (Nosyrev y Chepurchenko y Korkina, 2018a)
Studies are aimed at ensuring the safety and operational reliability of freight cars
Summary
The authors of (Gorfin, 2003) did not consider the dynamic loads acting on the carriage when calculating the rotary car dumper in the process of dumping. The turn of the car dumper cradle occurs with some acceleration, which leads to the impact of the carriage body on the car dumper stopping plate. The results of the analysis of the carriage positions when unloading on the car dumper allowed us to conclude that the method (Gorfin, 2003) did not consider the following factors and processes that lead to significant damages of the load-bearing elements of the carriage structure. Violation of the geometry of the carriage body interaction with the stopping plate of the car dumper due to the uncompression of the leaf springs of the bogie swing suspension; loads from the weight of the car dumper cradle on the body top cord; additional loads on the body that occur when unloading monolithic (frozen or paked) cargo
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