Investigation of the Influence of a-Pillar on Passive Safety of a Vehicle in Case of Rollover

Abstract

The need for the means ensuring passive safety of a vehicle is becoming increasingly emphasized in the area of transport engineering. This area becomes particularly relevant when restoration of the damaged load bearing structures in vehicles is concerned. When performing restoration and modification of the vehicles according to specific needs or repairing them after traffic accidents, the lack of norms giving formalized determination of passive safety and recommendations for its assurance becomes obvious. Computational model of the roof structure developed in LSDYNA is presented, the weld intended for the structure joints is modelled, and residual stresses due to welding process are taken into account, the most effective model of weld location for A-pillar is selected and the influence of A-pillar on the strength of vehicle’s roof structure is determined in case of quasi-static compression.

Ways of introduction of the high-speed movement of passenger trains in Ukraine

“…In terms of population size, economic activity, cultural development, and tourism development, the following most important regions of Ukraine can be identified: Kiev and the Kiev region; Kharkiv and Poltava; Dnepropetrovsk, Dneprodzerzhinsk, Zaporozhye and Krivoy Rog; Region of Donbass (Donetsk, Lugansk, Mariupol, Gorlovka and Makeyevka); Odessa and Crimea peninsula (Odessa, Nikolaev, Kherson, Simferopol and Sevastopol); Western region (Lviv, Ternopil, Khmelnitsky and Vinnitsa) [4,6].…”

“…Based on the successful experience of networks of world high-speed railways, the following main principles of their operation can be singled out: the lines are intended exclusively for passenger transportation; compatibility of the high-speed rail system with the existing rail network, as well as functioning based on the principles of high-frequency traffic and a competitive short duration of travel [3,6,9].…”

“…This Directive was amended and supplemented in 2004 and then in 2007 by Directives 2004/50/EC and 2007/132/EC, which update its content in accordance with the 2001 Directive on the Interoperability of the Traditional Trans-European Railway System. This new impetus is part of the strategy for revitalizing rail transport in Europe and helping to cope with the harmful consequences associated with excessive use of road transport [3][4][5][6].…”