Low velocity impact of a deformable multi-body system

An analysis methodology for impact of multi-body systems comprising deformable and rigid bodies is described, and applied to the analysis of a portable radar system which undergoes elastic and plastic deformation as well as significant rigid body motion during impact. A detailed local finite element analysis is first performed for developing simplified non-linear structural properties, followed by a global finite element analysis which includes treatment of rigid bodies through the discrete equations of motion. Certain parameters, such as the flexibility of structural members in the load path, and the characteristics of the impact pad, were found to be essential for a correct simulation.