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Smart Structures and Systems Volume 24, Number 4, October 2019 , pages 427-434 DOI: https://doi.org/10.12989/sss.2019.24.4.427 |
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Fast fabrication of amphibious bus with low rollover risk: Toward well-structured bus-boat using truck chassis |
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Javad Mehrmashhadi, Philippe Mallet, Paul Michel and Amin TermehYousefi
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| Abstract | ||
| This study investigates the structural integrity of the amphibious tour bus under the rollover condition. The multi-purpose bus called Dual Mode Tour Bus (DMTB) which explores on land and water has been designed on top of a truck platform. Prior to the fabrication of new upper body and sailing equipment of DMTB, computational analysis investigates the rollover protection of the proposed structure including superstructure, wheels, and axles. The Computer-Aided Design (CAD) of the whole vehicle model is meshed and preprocessed under high performance using the Altair HyperMesh to attain the best mesh model suited for finite element analysis (FEA) on the proposed system. Meanwhile, the numerical model is analyzed by employing LS-DYNA to evaluate the superstructure strength. The numerical model includes detail information about the microstructure and considers wheels and axles as rigid bodies but excludes window glasses, seats, and interior parts. Based on the simulation analysis and proper modifications especially on the rear portion of the bus, the local stiffness significantly increased. The vehicle is rotated to the contact point on the ground based on the mathematical method presented in this study to save computational cost. The results show that the proposed method of rollover analysis is highly significant not only in bus rollover tests but in crashworthiness studies for other application. The critical impartments in our suggested dual-purpose bus accepted and passed \"Economic Commission for Europe (ECE) R66\". | ||
| Key Words | ||
| rollover analysis; ECE R66; superstructure; crashworthiness; LS-DYNA; finite element modeling | ||
| Address | ||
| Javad Mehrmashhadi: Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, United States Philippe Mallet and Paul Michel: S.A.S Les Canards De Paris, 92316 Sevres, France Amin TermehYousefi:Department of Mechanical Engineering, Tufts University, Medford, MA, 02155, United States | ||