Analysis of some issues in the theoretical studies of unloading flaps strength of wagon series Fains

摘要

The self-unloading wagons with saddle-shaped floor,known under the serial designation Fains,are equipped with unloading flaps contributing to the rapid mechanized unloading of the wagon.In general,the theoretical and experimental studies of such wagons are standardized in EN 12663-2: 2010.Unlike many other nodes,no specific conditions(load forces,application locations,supports,etc.)have been described in the standard in order to properly investigate the strength of unloading flaps.This leads to the use of various methods for determination of their strength,which on other hand can lead to their improper design.The report analyzes the current used methods for the investigation of the unloading flaps strength,as well as their advantages and disadvantages.It is recommended to develop a specific methodology,reflecting the specifics of the construction and its way of operation.In this way,unification in the investigation of the unloading flaps strength will be achieved,as well as avoiding of the oversizing or undersizing of these responsible nodes in the Fains series wagons.