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Experimental and Numerical Study of Rollover Crashworthiness of a Coach Body Section
Technical Paper
2012-01-1900
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The good mobility and large carrying capacity promote the popularity of intercity coach in mass transit, especially in the long distance passenger transport nowadays. However, accidents related to coach and bus usually involve large casualties. Higher risk of fatalities is exhibited in rollover than the other coach accident types. In order to protect the occupants when a rollover accident occurs, coach structure must have sufficient strength to resist the impact loads. This paper presents a rollover test of an intercity coach body section using both numerical simulation and experimental testing to investigate its rollover crashworthiness in accordance with ECE R66. A full scale coach body section is manufactured and a tilting bench is designed and fabricated. Displacement transducers and accelerometer are equipped to record the time history of superstructure deformation and impact acceleration. And the FE model was developed accordingly. Coupon tests were carried out to get the properties of the materials used in the body section. Rollover test is simulated using a nonlinear and explicit code, LS-DYNA. Good agreement is observed between the results from the experimental test and the numerical simulation in terms of the dynamic deformation and impact acceleration, which indicates that the numerical model is validated against the experiment model. Deformation of the superstructure is primarily attributed to plastic hinges in the areas where the side wall pillars and the cross-members are connected. Local buckling behaviors that are unfavourable for loads transmit are found in the cantrails, indicating that the cantrails need to be enhanced. In-depth analysis of the results from simulation and experimental test leads to several design guidelines for coach rollover safety. With the numerical model that is validated by the experimental test, optimization can be performed to improve the structural deficiency exhibited in rollover test.
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Li, Y., Lan, F., and Chen, J., "Experimental and Numerical Study of Rollover Crashworthiness of a Coach Body Section," SAE Technical Paper 2012-01-1900, 2012, https://doi.org/10.4271/2012-01-1900.Also In
References
- UNECE. R66 Uniform Technical Prescriptions Concerning the Approval of Large Passenger Vehicles with Regard to the Strength of Their Superstructure[S] 2006
- Liang, C C Le, G N. Analysis of Bus Rollover Protection under Legislated Standards using LS-DYNA Software Simulation Techniques[J] International Journal of Automotive Technology 2010 11 4 495 506
- Kwasniewski, L Bojanowski, C Siervogel, J et al. Crash and Safety Assessment Program for Paratransit Buses[J] International Journal of Impact Engineering 2009 36 2 235 242
- Horstemeyer, M F Li, H Siervogel, J et al. Material and Structural Crashworthiness Characterization of Paratransit Buses[J] International Journal of Crashworthiness 2007 12 5 509 520
- Tech, T. Iturrioz, I. “Structural Optimization of a Bus in Rollover Conditions,” SAE Technical Paper 2009-36-0131 2009 10.4271/2009-36-0131
- Cichocki, K Wekezer, J W Structural Response of Paratransit Buses in Rollover Accidents[J] International Journal of Crashworthiness 2007 12 3 217 225
- Chirwa, E C Terry, D Matsika, E Rollover Design Considerations of the Superstructure of a Thirty Two Passenger Seat Bus[C] Changsha, China 2011
- Su, R Gui, L Fan, Z Multi-objective Optimization for Bus Body with Strength and Rollover Safety Constraints based on Surrogate Models[J] Structural And Multidisciplinary Optimization 2011 44 3 431 441
- Qi, W Simulation and Optimization of Bus Rollover Crashworthiness Based on ECE R66 Regulation [J] Automotive Engineering 2010 12 1042 1046
- Belingardi, G Martella, P Peroni, L Analysis of the Coach Rollover Scenario[J] Vehicle System Dynamics 2006 44 455 467
- Bojanowski, C Verification, Validation and Optimization of Finite Element Model of Bus Structure for Rollover Test[D] Florida State University 2009
- USDOT NHTSA's Motorcoach Safety Research Crash, Sled, and Static Tests[EB/OL] http://www.nhtsa.gov/DOT/NHTSA/NVS/Vehicle%20Research%20&%20Test%20Center%20(VRTC)/cw/811335.pdf 2011 04 07
- SAE J211-1-1995 Instrumentation For Impact Test. Part 1-Electronic Instrumentation[S] 1995