The Bcd Model for Biomechanical Application

For years, automotive engineers have been working to improve vehicle safety by using dummies, human corpses and animals to test safety systems. However, in most cases, crash tests do not consider drivers differences, much less their reactions. In reality, no one can make real crash tests with living drivers. Current approach is to simulate crashes using a driving simulator to analyze driver’s behaviour, especially before and during a crash incident. A campaign was organized on a static simulator, during which 40 subjects were asked to drive a 50kilometer runway and finally were exposed to a virtual crash. Some driver pre-crash positions are analysed with numerical simulations, reproducing the situation of a head-on collision at about 50km/h. The results of runs highlight critical situations which could lead to serious injuries. Designers provide their car with protective barriers. These barriers are efficient if some postural condition are respected. This paper describes most particularly how we used a BCD approach to understand why drivers land up in critical position at the time of pre-crash. The goal of this study is to purpose a framework in order to describe and analyse the consequences of a deviated behaviour faced protective barriers such as air bag.