English, 15 pages, 18 figures, 16 references
Keywords: Computational dynamic, multibody systems, vehicle dynamic

Multibody systems are well established and accepted mechanical models [ADAMS, CARAT, PCCrash, MADYMO] used to perform the dynamic analysis of vehicles and passengers involved into different road vehicle accident scenarios. In fact, all known commercial software considered for road accident reconstruction and simulation based on several different multibody systems. However, it could be very useful if the user could generate its own multibody based mechanical model suited for a particular problem. Computer based assembly of the mathematical model for arbitrary multibody system is introduced that is capable to develop the kinematic and kinetic equations of motion in symbolic form for such multibody system. The symbolic generation of the equations of motion is particularly attractive since the equations have to be generated only once and afterwards numerically analyzed for various parameter values. Such a tool enables one to generate an arbitrary mathematical model suited for particular road accident reconstruction problem. Also the classical analysis could be easily extended to perform sensitivity analysis or stability analysis.