Research on the Test Simulation Method of Trolley Side Impact of UN R129

According to the trolley side impact condition of UN R129 children restraint system, 2 kinds of simulation test methods were developed and the feasibility was verified. Based on the validated test method, the numerical simulation of side impact in 3 different restraint systems (5-point-car seat belt, 5-point-ISOFIX and shield-car seat belt) with Q3 child FE dummy model was adopted. The kinematic response of the child occupant and the physical parameters of head, neck and thorax were analyzed. The results showed that the child occupant kinematic was different in various types of CRS. The injury physical parameters of child head in the ISOFIX CRS was the highest, the HPC15 and head acceleration (3ms) were 2085.0 and 171.7g. Chest acceleration (3ms) and neck bending moment value of child occupants in the ISOFIX CRS and shield CRS were much higher than children's injury tolerance limit. The chest and neck of a child occupant in a side impact are subject to high injury risk. The finding of this study could be valuable for child restraint system design for side impact.