Abstract:

The submarining mechanism for a H Ⅲ 5th rear female dummy was analyzed and some antisubmarining plans were put forward to meet the requirements of rear female occupant submarining in C-NCAP (China-New Car Assessment Program) implemented on July 1, 2015. The dummy movement was simplified and the equal condition in which relative slippage did not occur between lap belt and dummy abdomen during crash was obtained. Some anti-submarining plans were brought out considering one real-world vehicle situation, aiming at dummy abdomen obliquity and the angle between lap belt acting force direction and horizontal level respectively. 10 plans were validated through the MADYMO software. 4 plans were applied to the real-world vehicle validation tests. The results show that the iliac unloading rate is less than 1 kN/ms. Therefore, the antisubmarining plans are effective because no submarining happened according to the C-NCAP (2015).

Key words: automobile safety, rear female occupant, submarining, MADYMO software, China-New Car Assessment Program (C-NCAP)