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No 1 (2022) Technical mechanics
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6
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UDC 629.4:62-788.2
Technical mechanics, 2022, 1, 51 - 66
Asessment of dynamic loads on a motor-car train with a passive safety system in its collision with a large road vehicle
DOI:
https://doi.org/10.15407/itm2022.01.051
Sobolevska M. B., Horobets D. V.
Sobolevska M. B.
Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine
Horobets D. V.
Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine
A topical problem of the home railway transport is motor-car train renewval, speed increase, and safety
improvement in accordance with the Ukrainian State Standards DSTU EN 12633 and DSTU EN 15227, which
specify the passenger car crashworthiness and passive safety, respectively, in emergency collisions
with various obstacles. Relying on the world experience, researchers of the institute of Technical
Methanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine
developed a passive protection concept for home high-speed passenger trains in emergency collisions
according to the DSTU EN 15227 requirements, proposals on the passive propection of a home motor-car
train head car, lower- and upper-level honeycomb energy-absorbing devoces (EAD 1 and UL EAD,
respectively) for the head car front part, and EAD 2 and EAD 3 low-level devices to be installed
in intercar connecteions. The upper- and lower-level protective devices for home motor-car trains
were developed based on finite-element simulation results using previous experience in the development
of a passive protection device for a high-speed passenger locomotive and the results of a successful
crash test of its proptotype. For Scenario 3, which chraracterizes a collision of a reference motor-car
train at 110 km/h with a 15 t large road vehicle at a railway crossing, a model of a large deformable
obstacle (LDO) was developed in compliance with the DSTU EN 15227 requirements. Finite-element models
were developed to determine the force characteristics of interaction between the proposed head car
passive protection devices and an LDO. The aim of this paper is to determine dynamic loads on a
motor-car train equipped with passive protection devices in its collision with a large road vehicle.
Based on a mathematical collision model for identical motor-car trains, a mathematical model was
developed for a collision of a reference train with a large road vehicle at a railway crossing
(Scenario 3) with account for the determined force characteristics of obstacle ? two EAD 1
low-level devices and obstacle ? two UL EAD upper-level devices interaction and the in-collision
work of the head car structure. Dynamic loads on the cars of a reference train with a passive safety
system (a head car mass of 80 t and intermediate car masses of 50 t or 64 t) were analyzed for its
collision by Scenario 3. Two EAD layouts in the head car front part were studied. It was found
that the proposed passive protection of the reference train cars meets the DSTU EN 15227 criteria
for Scenario 3 for both EAD layouts and the determined variants of lower- and upper-level EAD use
according to the intermediate car masses. The proposed mathematical model of dynamic loads on a
passenger train with a passive safety system in its collision with a large road vehicle and the
results obtained may be used in designing an up-to-date high-speed motor-car train to the DSTU
EN 15227 requirements.
motor-car train, emergency collision, large road vehicle, head car, passive protection devices, dynamic load
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19. Sobolevska M. B., Horobets D. V. Analysis of the interaction between a passenger train with passive safety system and a large road vehicle in a collision. Teh. Meh. 2019. No. 1. Pp. 90-106. (in Russian),
https://doi.org/10.15407/itm2019.01.094
20. Sobolevska M. B., Horobets D. V., Syrota S. A. Determination of the force characteristic of head car's passive safety system - large road vehicle interaction in a collision. Teh. Meh. 2021. No. 4. Pp. 118-128.
https://doi.org/10.15407/itm2021.04.118
Copyright (©) 2022 Sobolevska M. B., Horobets D. V.
Copyright © 2014-2022 Technical mechanics
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