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In order to understand an occupant's often violent and complicated motion during rollover accidents, the motion of an anthropomorphic dummy was predicted dynamically using the Articulated Total Body model, a human body gross motion simulation program. The accuracy of the predicted motion was established by its favorable comparison to that recorded on high speed film during a 60 mph crash in which the vehicle rolled over four times. This vehicle motion was then modified to six other rollover crash situations for computer simulation. Significant changes in the predicted occupant motion were readily observed. Differences were also observed in occupant accelerations and impact and belt forces. Keywords: Computer simulation, Modeling, Biodynamics.
Governed by strict regulations and the intricate balance of complex interactions among variables, the application of mechanics to vehicle crashworthiness is not a simple task. It demands a solid understanding of the fundamentals, careful analysis, and practical knowledge of the tools and techniques of that analysis. Vehicle Crash Mechanics s
According to the National Highway Traffic Safety Administration, “of the nearly 9.1 million passenger car, SUV, pickup and van crashes in 2010, only 2.1% involved a rollover. However, rollovers accounted for nearly 35% of all deaths from passenger vehicle crashes. In 2010 alone, more than 7,600 people died in rollover crashes.” Rollover accidents continue to be a leading contributor of vehicle deaths. While this continues to be true, it is pertinent to understand the entire crash process. Each stage of the accident provides valuable insight into the application of reconstruction methodologies. Rollover Accident Reconstruction focuses on tripped, single vehicle rollover crashes that terminate without striking a fixed object. Topics featured in this book include: • Analysis methods through various accident phases, including advanced simulation • Vehicle event data recorder usage • Occupant ejection during rollover crash The goal of this title is to break down the various phases of a rollover crash to analyze each stage for use in the reconstruction process - to the greater understanding of crash analysts, consultants and safety engineers alike.
According to the National Highway Traffic Safety Administration, “of the nearly 9.1 million passenger car, SUV, pickup and van crashes in 2010, only 2.1% involved a rollover. However, rollovers accounted for nearly 35% of all deaths from passenger vehicle crashes. In 2010 alone, more than 7,600 people died in rollover crashes.” Rollover accidents continue to be a leading contributor of vehicle deaths. While this continues to be true, it is pertinent to understand the entire crash process. Each stage of the accident provides valuable insight into the application of reconstruction methodologies. Rollover Accident Reconstruction focuses on tripped, single vehicle rollover crashes that terminate without striking a fixed object. Topics featured in this book include: • Analysis methods through various accident phases, including advanced simulation • Vehicle event data recorder usage • Occupant ejection during rollover crash The goal of this title is to break down the various phases of a rollover crash to analyze each stage for use in the reconstruction process - to the greater understanding of crash analysts, consultants and safety engineers alike.
The motion of an occupant during a rollover crash is often Violent and complicated. This motion needs to be studied so as to determine how best to protect an occupant during a rollover crash, and the best tool known is computer models which simulate the motion of an occupant. It was the Air Force's Articulated Total Body (ATB) model which was used. The accuracy of the simulations by this model has to be determined through a limited number of rollover crash tests. Five such tests were conducted under this program using a specially designed rollover test device, and the corresponding simulations of the motion of a dummy occupant are presented. The accuracy of the simulations obtained for these five tests with a rollover test device and the similar accuracy for one full-scale crash test conducted earlier on a different testing program provide confidence that an occupant's motion during a rollover crash, whether belted or unbelted, can be satisfactorily simulated by the Air Forces ATB. Computer simulations, Modeling, Biodynamics, Rollover, Crash.