The Crashworthy Car-Body Structure Design And Analysis For The Electric Lomotive

With the rapid development of Chinese railway enterprise, people pay more and more attentions to the safety performance of the rolling stock, to carry out crashworthiness research of the locomotive car-body structure, so that our railway enterprise has access to safe, healthy, efficient and sustainable development, has become essential.Firstly, this article summarizes the research status at home and abroad of the locomotive’s passive safety technology, puts forward a classification method of the locomotive’s collision accident, and outlines the research methods of the locomotive’s crashworthiness; Secondly, some theories have been introduced, such as the nonlinear characteristics, the basic mechanical equations and the finite element methods in the collision simulation process; In the case of an electric locomotive, then, by researching into the basic design concept and the crashworthiness evaluation criteria of the crashworthy locomotive, the paper presents one crash-box, a kind of collision energy-absorbing device, and checks its actual energy absorption characteristics by simulation, the results show that the crash-box has a stable deformation and a good energy absorption property. After that, through the detailed study of the actual structure, for example, the locomotive car-body, the energy-absorbing device, the bogie and the railway, etc., the connection between the locomotive car-body and bogie and the contact between the wheel and the railway, an accurate and effective finite element model for the electric locomotive is modeled, based on the engineering application of the simulation software.Finally, according to the literature and the standard, six typical scenarios are calculated to research the crashworthiness of the electric locomotive systematically, the simulation results show that the crash-box plays a useful role in absorbing energy, and the electric locomotive not only can meet the standard, EN15227, but also has a good multi-level energy dissipation system.In addition, this thesis conducts the "secondary impact" study on the electric locomotive, and find out both of the drivers’chest deflection beyond the limit because of the cab console’s strong rigidity. Besides, the main driver’s both femur force criterion and tibia index also beyond their limit. In a word, the main driver injuries more seriously than the assistant driver. It is suggested that the optimization design work about the console should be carried out promptly and a deformable console with both sufficient strength and good energy-absorbing performance is developed at an early date, while the console is equipped with an airbag.