By a News Reporter-Staff News Editor at Journal of Engineering -- Investigators discuss new findings in Mechanical Engineering. According to news reporting out of Dublin, Ireland, by VerticalNews editors, research stated, "In this article the multibody simulation software package MADYMO for analysing and optimizing occupant safety design was used to model crash tests for Normal Containment barriers in accordance with EN 1317. The verification process was carried out by simulating a TB31 and a TB32 crash test performed on vertical portable concrete barriers and by comparing the numerical results to those obtained experimentally."
Our news journalists obtained a quote from the research from the University of Dublin Trinity College, "The same modelling approach was applied to both tests to evaluate the predictive capacity of the modelling at two different impact speeds. A sensitivity analysis of the vehicle stiffness was also carried out. The capacity to predict all of the principal EN1317 criteria was assessed for the first time: the acceleration severity index, the theoretical head impact velocity, the barrier working width and the vehicle exit box. Results showed a maximum error of 6% for the acceleration severity index and 21% for theoretical head impact velocity for the numerical simulation in comparison to the recorded data. The exit box position was predicted with a maximum error of 4 degrees. For the working width, a large percentage difference was observed for test TB31 due to the small absolute value of the barrier deflection but the results were well within the limit value from the standard for both tests. The sensitivity analysis showed the robustness of the modelling with respect to contact stiffness increase of +/- 20% and +/- 40%."
According to the news editors, the research concluded: "This is the first multibody model of portable concrete barriers that can reproduce not only the acceleration severity index but all the test criteria of EN 1317 and is therefore a valuable tool for new product development and for injury biomechanics research."
For more information on this research see: Multibody modelling of a TB31 and a TB32 crash test with vertical portable concrete barriers: Model verification and sensitivity analysis. Proceedings of the Institution of Mechanical Engineers Part K-Journal of Multi-Body Dynamics, 2013;227(3):245-260. Proceedings of the Institution of Mechanical Engineers Part K-Journal of Multi-Body Dynamics can be contacted at: Sage Publications Ltd, 1 Olivers Yard, 55 City Road, London EC1Y 1SP, England.
Our news journalists report that additional information may be obtained by contacting G. Amato, University of Dublin Trinity College, Dept. of Civil Struct & Environ Engn, Dublin 2, Ireland. Additional authors for this research include F. O'Brien, B. Ghosh and C.K. Simms.
Keywords for this news article include: Dublin, Europe, Ireland, Mechanical Engineering
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