Habtamu, Tekubet (Mr.)Henok, Chala2019-06-252023-11-042019-06-252023-11-042015-06http://etd.aau.edu.et/handle/123456789/18581Complex nonlinear interaction phenomena between rail wagon and track significantly influence the dynamic performance. Thus to alleviate the drawback arise due to poor vehicle riding behavior, predicting parameter that quantify performance and certifying the wagon have inevitable significant. The objective of the study is to model and simulate dynamic performance of X4K container carrier freight wagon with 48 DOF on selected Ethio- Djibouti 1.8 km horizontal track i.e. continuous straight, transitional and circular track using Simpack 9.6 having considered critical operation maneuver i.e. 100Km/hr maximum wagon running speed and 93 ton total load. The obtained simulation result indicated; maximum derailment coefficient (Y/Q=0.24098), maximum lateral track shift force ΣFy=72,438.5N, ride quality index WZ(vertical)=2.5769 & WZ(lateral)=2.1786 and maximum wear index Γw=360.47N during curve negotiation have been found. Then conclusion drawn i.e. derailment coefficient obtained result and lateral track shift as it’s compared UIC 518 validating standard, the propensity of wagon derailment validated safe range and the track shift force that induce lateral track irregularity, gauging validated in acceptable range. The ride quality index for both vertical and lateral direction that quantify the running performance of the vehicle validated as per CEN (2005) and the result found acceptable riding performance. While, the wear index resulted from simulation indicated beyond the allowable wear index limiting standard particularly during the wagon negotiate curved track and at intermediate & curved track junction. Consequently at operational speed maneuver (100Km/hr) the tendency of mild or severe wear occurrence between wheel/rail contacts validated high. To alleviate this problem optimization wear index have been conducted by consider operational speed reduction and a medium wear rate found in favor of reduced speed. Therefore the study recommended to use 70Km/hr during the wagon negotiates the curve and transition track.en-USRailway dynamic performance Safetylateral track shift forceDerailment Coefficient ride quality indexwear indexThesis