Occupant responses in standard and ABTS seats in high-speed rear sled checks.

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Occupant responses in standard and ABTS seats in high-speed rear sled checks.

Visitors Inj Prev. 2018 Jan 02;19(1):54-59

Authors: Viano DC, Parenteau CS, Burnett R, Prasad P

Summary
OBJECTIVE: This research in contrast biomechanical responses of a usually seated Hybrid III dummy on standard and all belts to seat (ABTS) seats in 40.2 km/h (25 mph) rear sled checks. It decided the distinction in efficiency with fashionable (?2000 MY) seats in comparison with older (<2000 MY) seats and ABTS seats.
METHODS: The seats had been fastened in a sled buck subjected to a 40.2 km/h (25 mph) rear sled take a look at. The heart beat was a 15 g double-peak acceleration with 150 ms length. The 50th percentile Hybrid III was lap-shoulder belted within the FMVSS 208 design place. The testing included 11 <2000 MY, eight ?2000 MY, and seven ABTS seats. The dummy was absolutely instrumented, together with head accelerations, higher and decrease neck 6-axis load cells, chest acceleration, thoracic and lumbar backbone load cells, and pelvis accelerations. The height responses had been normalized by harm evaluation reference values (IARVs) to evaluate harm dangers. Statistical evaluation was carried out utilizing Pupil’s t take a look at. Excessive-speed video documented occupant kinematics.
RESULTS: Biomechanical responses had been decrease with fashionable (?2000 MY) seats than older (<2000 MY) designs. The decrease neck extension second was 32.5 ± 9.7% of IARV in fashionable seats in comparison with 62.eight ± 31.6% in older seats (P =.01). Total, there was a 34% discount within the comparable biomechanical responses with fashionable seats. Biomechanical responses had been decrease with fashionable seats than ABTS seats. The decrease neck extension second was 41.four ± 7.eight% with all MY ABTS seats in comparison with 32.5 ± 9.7% in fashionable seats (P =.07). Total, the ABTS seats had 13% larger biomechanical responses than the trendy seats.
CONCLUSIONS: Fashionable (?2000 MY) design seats have decrease biomechanical responses in 40.2 km/h rear sled checks than older (<2000 MY) designs and ABTS designs. The improved efficiency is in line with a rise in seat energy mixed with improved occupant kinematics by pocketing of the occupant into the seatback, larger and extra ahead head restraint, and different design adjustments. The strategies and information introduced right here present a foundation for standardized testing of seats. Nonetheless, an entire understanding of seat security requires consideration of out-of-position (OOP) occupants in high-speed impacts and consideration of the rather more widespread, low-speed rear impacts.

PMID: 28678610 [PubMed – indexed for MEDLINE]

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