Multibody simulation of an Osteogenesis Imperfecta Child model fit over Harmonic Dynamic System

This research examines a 2D Harmonic Dynamic System (HDS) proposed to reduce the kinetic energy transferred to the child body in a motor vehicle crash with the purpose of its subsequent implementation for use in children with bone-degenerative diseases such as Osteogenesis Imperfecta (OI). The 3D model from the HDS was modified into a simplified 2D model that considers the components present in the XY plane such as rails, springs and shock absorbers that damping excessive movements along the X axis. The 2D multibody numerical analysis was conducted using WorkingModel® during an interval of 140 ms, the boundary conditions were in accordance with the United Nations Economic Commision for Europe UN Regulation No. 129 for a CRS frontal test evaluation (CRS). The kinetic behavior observed shows a great correlation between the 2D multibody test and the test evaluation from the literature. Although the results were satisfactory for the 2D case proposed, the multibody analysis needs to be revised in a 3D multibody test considering a more detailed CRS and HDS as well as components such seatbelt.