MADYMO modeling method of rollover event and occupant behavior in each rollover initiation type

Takagi, Hideo; Maruyama, Akihisa; Dix, Jeff; Kawaguchi, Koichi

Affiliations

²Nissan Technical Center North America Inc., USA

Abstract

The purpose of this research was to understand the differences between vehicle and occupant kinematics for the various forms of rollovers. In particular the occupant kinematics in the initial phase of the rollover was studied, which is critical in determining the restraint system activation timing.

Six rollover tests were conducted consisting of six initiation types; FMVSS 208, SAE J857, corkscrew, curb trip, soil trip, and ditch rollover. From this test data MADYMO models were constructed of the vehicle and occupant. The test data included the influence of gravity, therefore, a method to adjust for the influence of gravity was developed for the MADYMO models.

The vehicle model were validated using curb trip and SAE J857 tests. The compensation procedure for the influence of gravity was also confirmed. Once the vehicle model was validated using the two test modes, each of the other test modes were simulated and the dummy head behavior was compared to the actual test data.

From the simulation results and the actual test data the differences in the occupant kinematics for each of the rollover initiation types was compared.

Links

URL: http://www-nrd.nhtsa.dot.gov/pdf/esv/esv18/CD/Files/18ESV-000236.pdf

Cited Works (1)

Year	Entry
2001	Ridella SA, Nayef A, Altamore PF. Rollover: a methodology for restraint system development. In: Proceedings of the 17th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 4-7, 2001; Amsterdam, The Netherlands.

Cited By (3)

Year	Entry
2015	Yang KH, Chou CC. Mathematical models, computer aided design, and occupant safety. In: Yoganandan N, Nahum AM, Melvin JW, eds. Accidental Injury: Biomechanics and Prevention. 3rd ed. New York: Springer; 2015:143-182.
2017	Lee E, Shrivatri A, Ohara S. NHTSA oblique test data analysis method by LS-DYNA modeling. In: Proceedings of the 25th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 5-8, 2017; Detroit, MI.
2007	Hu J. Neck Injury Mechanism in Rollover Crashes: A Systematic Approach for Improving Rollover Neck Protection [PhD thesis]. Detroit, MI: Wayne State University; 2007.