Abstract
A bus rollover is one of the most severe accidents that usually causes a large number of fatalities and injured occupants. This paper aims to investigate the key parameters affecting the damage and deformation behaviours of bus superstructure under rollover test according to Economic Commission for Europe Regulation 66 (ECE R66) as well as to design an economical lightweight bus structure by using response surface optimisation technique. The rollover simulations are performed by means of explicit dynamic analysis via Radioss finite element programme and validated by experimental data. Factorial design is implemented to pinpoint significance of each structural component based on its energy absorption under rollover condition. The significant parameters for rollover safety are found to be the stiffness of roof, pillar, and floor structures, respectively. Crashworthiness Index (CI) is proposed as an evaluation factor of overall rollover strength of bus structure. A ratio of CI to mass is proposed as an improvement criterion to supervise the progressive path of steepest descent and used to control the degree of improvement. Successive response surface optimisation via central composite design and composite desirability are employed to resolve the optimum lightweight bus structure passing ECE R66 requirements.
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References
Altair Engineering, Inc. (2014). RADIOSS Ver. 13.0.0 User’s Guide.
Biles, W. E. and Swain, J. J. (1980). Optimization and Industrial Experimentation. John Wiley & Sons. New York, USA.
Croccolo, D., Argostinis, M. D. and Vincenzi, N. (2011). Structural analysis of an articulated urban bus chassis via FEM: A methodology applied to a case study. J. Mechanical Engineering57, 11, 799–809.
Gauchia, A., Diaz, V., Boada, M. J. L. and Boada, B.-L. (2010). Torsional stiffness and weight optimization of a real bus structure. Int. J. Automotive Technology11, 1, 41–47.
Hou, S., Dong, D., Ren, L. and Han, X. (2012). Multivariable crashworthiness optimization of vehicle body by unreplicated saturated factorial design. Structural and Multidisciplinary Optimization46, 6, 891–905.
Hou, S., Liu, T., Dong, D. and Han, X. (2014). Factor screening and multivariable crashworthiness optimization for vehicle side impact by factorial design. Structural and Multidisciplinary Optimization49, 1, 147–167.
Jain, R., Tandon, P. and Kumar, V. (2014). Optimization methodology for beam gauges of the bus body for weight reduction. Applied and Computational Mechanics8, 1, 47–62.
Liang, C. C. and Le, G. N. (2010a). Optimization of bus rollover strength by consideration of the energy absorption ability. Int. J. Automotive Technology11, 2, 173–185.
Liang, C. C. and Le, G. N. (2010b). Bus rollover crashworthiness under European standard: An optimal analysis of superstructure strength using successive surface method. Int. J. Crashworthiness14, 6, 623–639.
Lin, Y. C. and Nian, H. C. (2006). Structural design optimization of the body section using the finite element method. SAE Paper No. 2006-01-0954.
Li, Y., Lan, F. and Chen, J. (2012). Numerical study on the influence of superstructure configuration on coach rollover resistance performance. Int. J. Crashworthiness17, 6, 637–654.
Montgomery, D. C. (2005). Design and Analysis of Experiments. 3rd edn. John Wiley & Sons. New York, USA.
National Highway Traffic Safety Administration, U.S., Department of Transportation (1991). FMVSS 220 Standard — School Bus Rollover Protection. TP-220-02.
Shi, L., Yang, R.-L. and Zhu, P. (2013). An adaptive response surface method for crashworthiness optimization. Engineering Optimization45, 11, 1365–1377.
Su, R., Gui, L. and Fan, Z. (2011). Multi-objective optimization for bus body with strength and rollover safety constraints based on surrogate model. Structural and Multidisciplinary Optimization44, 3, 431–441.
Thai-German Graduate School of Engineering (TGGS), King Mongkut’s University of Technology North Bangkok (2012). Design Project of Single-deck and Double-deck Bus Body Sections.
United Nations Economic Commission for Europe, United Nations (2017). Large Passenger Vehicles with Regard to the Strength of Their Superstructure.
Wang, T., Wang, L., Wang, C. and Zou, X. (2018). Crashwothiness analysis and multi-objective optimization of a commercial vehicle frame: a mixed meta-modeling-based method. Advances in Mechanical Engineering10, 5, 1–12.
Zhang, G., Zhang, X. and Liu, B. (2011). The study of bus superstructure strength based on rollover test using body sections. Advances in Multimedia, Software Engineering and Computing2, 129, 315–322.
Zhu, P., Pan, F., Chen, W. and Viana, F. A. C. (2013). Lightweight design of vehicle parameters under crashworthiness using conservative surrogates. Computers in industry64, 3, 280–289.
Acknowledgement
The authors gratefully acknowledge financial support provided by the Research and Researcher for Industry (RRi) under the Thailand Research Fund (TRF) no. MSD 59I0020. Thapaphon Jarungporn and Wutiporn Kammalakul are thanked for their valuable comments in the early stage of this research.
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Kunakorn-ong, P., Jongpradist, P. Optimisation of Bus Superstructure for Rollover Safety According to ECE-R66. Int.J Automot. Technol. 21, 215–225 (2020). https://doi.org/10.1007/s12239-020-0021-z
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DOI: https://doi.org/10.1007/s12239-020-0021-z