Gorobets' D. The determination of rational parameters of passive protection elements of passenger coaches under train emergency collisions

The process of dynamic loading of structures of coaches for passenger trains equipped with devices of passive protection, at crash of a train with obstacles is the object of probes. The purpose of this dissertation is in improvement of the safety system of a rolling stock for reducing the effect of longitudinal excess loads in emergency situations on passengers and train personnel. The methods of numerical integration of the differential equations and a method of finite elements are used in conducting the investigations. As a result of the work completed: the mathematical model of crash process of a passenger train with an obstacle in the form of consideration of equipping the train vehicles with devices of passive protection as well as the finite-element mathematical model for computing the strained-and-stressed state of a frame of the passenger coach of model 47D that considers features of deformation of power absorbing elements of devices of passive protection have been improved. On the basis of the theoretical and pilot research activities conducted, for a design of passive protection of passenger coaches the rational parameters of power absorbing elements of box-shaped type are chosen and the recommendations on equipping the passenger coaches with these power absorbing elements are developed and transferred to the JSC "Kryukov Car-Building Works" as well. The theoretical and practical results obtained in the dissertation can be used by organizations and enterprises in design of a passenger rolling stock of new generation.