fa Railway track and structures Railway track and structures پژوهشي Research This research is concerned with weighing the behavior of the front end energy absorption system of a locally manufactured locomotive in crash situations. The causes of the extensive damages to the energy absorption apparatus that includes the crash element and the buffer are studied. By choosing the proper damage model the conditions of the accident is simulated by using the ABAQUS engineering software. The amount of the absorbed energy during a crash is estimated. Improvement of the existing mechanism is also considered. A metal honeycomb energy absorber is proposed to increase the energy absorption capacity of the locomotive front end. IrSa locomotive, Crash Energy absorption, Honeycomb structure 51 62 http://ijrare.iust.ac.ir/browse.php?a_code=A-10-97-2&slc_lang=fa&sid=1 Iman Frestade 180031947532846001410 180031947532846001410 No School of railway Eng., Iran University of Science and Technology School of railway Eng., Iran University of Science and Technology Parisa Hosseini Tehrani 180031947532846001411 180031947532846001411 Yes School of railway Eng., Iran University of Science and Technology School of railway Eng., Iran University of Science and Technology Mahsa Fatehi 180031947532846001412 180031947532846001412 No School of railway Eng., Iran University of Science and Technology School of railway Eng., Iran University of Science and Technology Mojtaba Azizi 180031947532846001413 180031947532846001413 No School of Electrical Engineering, Amirkabir University of Technology School of railway Eng., Iran University of Science and Technology