HIGH-SPEED RAILWAY BRIDGES: CHALLENGES FOR ENGINEERS OF THE CIS

Abstract

Purpose. National regulatory framework for the CIS does not contain a set of rules sufficient to design highspeed rail lines and related infrastructure. For example, the basic normative document SNiP «Bridges and pipes» there is no «dedicated passenger line» do not take into account the speed of trains, and a variety of dynamic effectsare taken into account empirical coefficients. Methodology. The main features of the system of higher technical education in the CIS are «typing» of course projects and papers, template learning process, the inability to select and change disciplines, departments and teachers. A serious challenge for the student acts as a permanent reduction in the number of classroom hours, with a clear shift towards self-education. At the same time, modern engineering essentially computerized, thanks to the active use of various computer-aided design. Findings. Recommendations for designers of high-speed railway bridges: in most cases sufficient to restrict rod finite elements; modal analysis will make it possible to identify «weak» construction sites, to determine the periods and frequency of free oscillations. Dynamic calculation of time will allow to analyze the stress-strain state of the bridge while driving a train at apredetermined rate, calculate the speed, handling, acceleration. Originality.Today in the CIS appear first private research centers. For example, the Ukrainian Research Laboratory «Dynamics & Structures, Lab.» (www.dystlab.com) was established to study and solve the problems of the dynamics of structures, buildings and structures, as well as related problems in the mechanics of deformable systems. Practical value. In the laboratory «Dynamics & Structures, Lab.» engaged in the development of specialized software – parametric modeling and engineering analysis environment Belinda Structure. Program based on the finite element method, and the simulation is carried out using scripting technologies. The interface of the program includes advanced tools for threedimensional visualization.