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Numerical Simulation and Optimization of a Locally Built Midibus Structure in Quasi-static and Rollover Condition

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Artificial Intelligence and Digitalization for Sustainable Development (ICAST 2022)

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Abstract

Rollover crashworthiness concerns the ability of a vehicle’s structural system and components to absorb energies with complete protection of occupants in dynamic (rollover) crash scenarios. First, this study aims to analyze a locally built midibus structure in rollover crashes using numerical investigation (LS-DYNA) as stated by United Nations Regulation 66 (UNECE R66). Also, this study considered the quasi-static simulation to determine the energy absorbing and load-deformation behavior of the midibus frame sections. Then, the two alternatives in design optimization were presented via reinforcement design and numerical optimization (Successive Response Surface Method in LS-OPT) to improve the strength and weight of the midibus structure. As a rollover simulation result, the maximum deformation of the baseline structure occurred at pillar A and three bays. As a result, the baseline midibus structure failed the standard requirement and has unacceptable strength in both quasi-static and rollover simulation. Moreover, related to the baseline model, the structure’s weight of the reinforced Model was effectively reduced by 5.2%. However, an optimized model (using the Successive Response Surface Method) has reduced the weight of the reinforced model by 5.6%. Lastly, the Energy Absorption and Specific Energy Absorption of the baseline and the two alternative models were evaluated and compared.

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Authors and Affiliations

  1. School of Mechanical and Industrial Engineering, Institute of Technology, Dire Dawa University, Dire Dawa, Ethiopia

    Hailemichael Solomon Addisu & Adino Amare Kassie

  2. Department of Mechanical Engineering, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia

    Ermias Gebrekidan Koricho

Authors
  1. Hailemichael Solomon Addisu
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  2. Ermias Gebrekidan Koricho
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  3. Adino Amare Kassie
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Correspondence to Hailemichael Solomon Addisu .

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Editors and Affiliations

  1. Bahir Dar University, Bahir Dar, Ethiopia

    Bereket H. Woldegiorgis

  2. Western University, London, ON, Canada

    Kibret Mequanint

  3. Bahir Dar Institute of Technology, Bahir Dar, Ethiopia

    Mekuanint A. Bitew

  4. Bahir Dar University, Bahir Dar, Ethiopia

    Teketay B. Beza

  5. Bahir Dar University, Bahir Dar, Ethiopia

    Abdulkerim M. Yibre

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Addisu, H.S., Koricho, E.G., Kassie, A.A. (2023). Numerical Simulation and Optimization of a Locally Built Midibus Structure in Quasi-static and Rollover Condition. In: Woldegiorgis, B.H., Mequanint, K., Bitew, M.A., Beza, T.B., Yibre, A.M. (eds) Artificial Intelligence and Digitalization for Sustainable Development. ICAST 2022. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 455. Springer, Cham. https://doi.org/10.1007/978-3-031-28725-1_7

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  • DOI: https://doi.org/10.1007/978-3-031-28725-1_7

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