Akademik Veri Yönetim Sistemi
7th International Mediterranean Science and Engineering Congress, Antalya, Türkiye, 24 - 26 Ekim 2022, ss.240
Abstract: Buffer stops are infrastructure items at the end of rail tracks. They are used to prevent rolling stock from running
off the end of the track and reduce the impact forces to minimise damage to rolling stock. Several different types of buffer
stop have been developed. Friction buffer stop is the most effective way to stop moving rolling stock. The sliding friction
buffer stop is designed to dissipate the impact energy in a controlled manner via the sliding action of the friction shoes fitted
between the frame and rail profile. In this study, the situation of stopping the representative 600-ton train mass within the
limits determined by the specification according to the loading scenario of the Buffer Stop System at two different speeds was
examined. First of all, CAD data of the Buffer Stop System were created and arrangements were made in accordance with
the structural analysis. The train part is modeled as a rigid block. Its mass is 600 tons in total. Sheet metal parts, rails and other
related elements on the model are defined using material models in LS-DYNA software. In the model, the contact relations
between the vehicle and the Buffer Stop, the friction parts and the rails, and the Buffer Stop itself are defined as frictional
contact. The static and dynamic friction coefficients were obtained from the relevant literature. The train mass weighing 600
tons hits the Buffer Stop model at a speed of 60 km/h and 30km/h. The analysis solution starts with the exact moment of
impact. Areas subjected to plastic deformation on the Buffer Stop System were identified.