Engineering Mechanics

Proceedings Vol. 20 (2014)

ENGINEERING MECHANICS 2014

Copyright © 2014 Brno University of Technology Institute of Solid Mechanics, Mechatronics and Biomechanics

 

Iván L., Popovič M.
pages 269 - 272, full text

The aim of this project was to setup a surrogate process that is able to substitute a real crash test of road barriers. As a standardized vehicle was used a typical city bus. The sensitivity analysis was performed due to detailed understanding of the parameters limits and their relations. The sensitivity study enables to check more than one crash test loadcase. Two variants of optimization were used, the standard optimization procedure and optimization with meta-model based on the previous sensitivity study. Both of them used the evolutionary algorithm. The goal was to increase a maximum internal energy of the barrier. Apart from that the vehicle maximum deceleration was improved. The optimized barrier model was verified in the thorough explicit numerical study due to investigation of the detailed interaction between the barrier model and the vehicle model. The effect of the testing vehicle on the crash barriers can be evaluated in tens of impact directions and impact velocity values. Apart from that the design of barriers was improved. The detailed numerical analysis of the “best” variant confirms a good relation between numerical simulations and real tests.

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