آيسو حسين زاده

Couplers and draftgears stops are responsible for transferring longitudinal forces during train operation and connecting the wagons to each other. They are the first components to be affected in the event of a collision, and their performance significantly affects the dynamic behavior of the train. At the repair and maintenance terminal, couplings between wagons are made at speeds below 5 kilometers per hour. However, it is possible for operators to make mistakes and unintended collisions may occur at speeds higher than 5 kilometers per hour, at which point energy-absorbing pipes are damaged. Therefore, this thesis eva‎luates the effect of energy-absorbing properties of couplers at speeds below 15 kilometers per hour for shunting operations and automatic train coupling in Tehran's subway trains, to determine at what speeds and how many crash tubes are damaged. Lines three, four, six, and seven of the Tehran metro have eight-car trains, and the supply of eight-car trains is part of the future plan for the Tehran metro. In light of the project to convert seven-car trains to eight-car trains in the country, collisions between eight-car and seven-car trains have also been eva‎luated, and the results have been presented. According to the results of the analysis, only the couplers are involved up to a speed of 5 kilometers per hour, which is the maximum coupling speed at the repair and maintenance terminal. At speeds between 5 and 15 kilometers per hour, the number of pipes involved increases with increasing collision speed, such that at a speed of 10 kilometers per hour, three of the tubes and at speeds of 15 kilometers per hour, five of the tubes are destroyed and must be replaced. The results of the collision of an eight-wagon train indicate that during the connection of the wagons at a speed of 5 kilometers per hour, the tubes also become involved. According to the train shunting standards, this coupler is not suitable for an eight-wagon train.

برخورد قطار مترويي , عمليات مانور قطار , مشخصات قلاب , ديناميك طولي قطار , لوله‌هاي جاذب انرژي

Metro train collision , Train shunting operation , coupler characteristice , longitudinal dynamics train , crash tube

Aysou hosseinadeh

habibollah molatefi