1 / 20

Reliability and Relevance of Rollover Occupant Injury Potential Tests

Reliability and Relevance of Rollover Occupant Injury Potential Tests. S Bozzini* and D Friedman** *Safety Engineering International, Goleta, CA, USA **Center for Injury Research, Santa Barbara, CA, USA. Presented by: Susie Bozzini.

kurt
Download Presentation

Reliability and Relevance of Rollover Occupant Injury Potential Tests

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Reliability and Relevance of Rollover Occupant Injury Potential Tests S Bozzini* and D Friedman** *Safety Engineering International, Goleta, CA, USA **Center for Injury Research, Santa Barbara, CA, USA Presented by: Susie Bozzini

  2. This paper was developed to examine to the difference between a lateral rollover test and a ramp rollover test in relation to predicting occupant injury in rollovers. Types of rollover Events

  3. Frequencies of different Rollover Types: Trip-Over and Flip-Over = 72% of all Rollovers

  4. Definitions of Trip-Overs

  5. Definitions of Flip-Overs

  6. Injury severity grades of belted not ejected occupants for different kinds of rollover - +300 Trip vs 65 Flip

  7. Comparison of Trip-Over and Flip-Over Frequency and Injury Level 4 times as many MAIS 2-4 and MAIS 5/6 in Trip-overs vs. Flip-overs

  8. Trip-Over Test Method Key components of the Jordan Rollover System (JRS): (1) vehicle, (2) cradle/spit mount, (3) moving roadbed, (4) support towers, (5) coupled pneumatic -roadbed propulsion and roll drive

  9. Vertical Crush in JRS Tests displayed on Residual Crush Injury Probability Chart

  10. Flip-Over Test Method Key components of the Ramp Rollover Test: (1) vehicle, (2) tow motor (3) ramp

  11. Ramp Rollover Impact Parameters vs. Lateral Rollover Impact Parameters

  12. Typical Rollover Result in Lateral Test Method – Significant Far Side A-Pillar Crush Production SUV roof crush v. roll angle

  13. Figure 12. – SUV with HALO™ roof crush v. roll angle

  14. CONCLUSIONS • Trip-over accidents represent 60% of rollovers and flip-overs represent 12%. Trip-overs are characterized by lateral rollover tests and flip-overs are characterized by ramp rollovers. • Typical physical ramp rollover tests at 50 mph are 2 ½ times more energetic than 30 mph lateral tests and do not represent real world flip-over accidents. • Comparative virtual testing between ramp rollover and lateral rollover conditions using a typical SUV, suggest that ramp rollovers are typically more benign than lateral rolls. • The roof crush in ramp rollover conditions tends to be more significant on the leading impact side and the roll rates at contact with the trailing side are not as high as those observed with lateral roll test conditions • Lateral Rollover tests more accurately predict Potential Occupant Injury because the testing parameters are more representative of the real world crash senarios.

  15. ACKNOWLEGEMENTS • The Authors would like to thank Friedman Research Corporation for their assistance with the data in this paper. Thank you Questions?

  16. Figure 7. Spreadsheet and Test, Roll and Pitch Velocity - SUV

  17. Figure 8. Spreadsheet and Test, Roll and Pitch Angles - SUV

  18. Figure 9. Spreadsheet and Test, Vehicle c.g. Velocity - SUV

  19. Figure 10. Spreadsheet and Test, Vehicle c.g. Displacement - SUV

  20. Table 7. List of roll sequence segments and serious-to-fatal injury probability

More Related