Comparative Evaluation of 6-Year-Old Hybrid III and DAPRR Prototype ATD Abdomen/Pelvis Components.

摘要

A prototype retrofit package consisting of an anthropometric pelvis and a gel-filled abdomen (together known as DAPRR) has been developed for the Hybrid III 6-year-old child ATD. The pelvis and abdomen are intended to better identify lap belt intrusion into the occupant’s abdomen in restraint evaluation tests. More biofidelic abdomen and pelvis components could therefore improve the prediction of abdomen injury when using the 6-year-old ATD. Both component level and dynamic sled tests were conducted on a Hybrid III 6-year-old with either the standard abdomen – pelvis structure (HYIII 6YO) or the prototype package with gel-filled abdomen and revised pelvis (DAPRR). Abdomen impact tests conducted with both dummies were repeatable and revealed that the DAPRR abdomen showed more penetration as test rate increased from 1.5 to 2.5 m/s. In addition, the DAPRR abdomen stiffness was independent of test rate. In belt pull tests, the DAPRR was more consistent with the biofidelity corridor than the HYIII 6YO. Sled tests indicated that the DAPRR was more sensitive to different types of restraint conditions than the HYIII 6YO, and that current FMVSS No. 213 injury assessment reference values (IARVs) were not significantly altered by DAPRR design changes from the standard Hybrid III. An alternative method for calculating abdomen penetration in the 6YO was developed, and the results were encouraging based on similarity in anterior superior iliac spine (ASIS) force versus abdomen penetration responses between belt pull component tests and sled testing. Overall, for all test modes, the DAPRR tended to display more abdomen penetration at lower force levels than the stiffer HYIII 6YO. In summary, the DAPRR prototype package appears to improve the sensitivity of the Hybrid III 6-year-old ATD to kinematic conditions associated with abdominal injury.