Effect of Occupant Weight and Initial Position in Low-to-High Speed Rear Sled Tests with Older and Modern Seats
Notice bibliographique
Résumé
<div class="section abstract"><div class="htmlview paragraph">The average body weight of the US population has increased over time. This study investigates the effect of increasing weight on seat and occupant responses in 15-18 km/h and 42 km/h rear sled tests. The effect of initial occupant posture is also discussed.</div><div class="htmlview paragraph">Seven tests were conducted with lap-shoulder belted ATDs (anthropometric test device) placed on older and modern driver seats. Four tests were conducted with a 50th percentile male Hybrid III, two with 95th percentile male Hybrid III and one with a BioRID. The ATDs were ballasted to represent a Class I or II obese occupant in three tests.</div><div class="htmlview paragraph">The tests were matched by seat model and sled velocity. The effect of occupant weight was assessed in three matches. The results indicated an increase in seatback deflection with increasing occupant weight. For example, the average dynamic deflection was 2.8-times greater with a ballasted 95th ATD than with a 50th ATD (20.2 v 7.3 degree) in the 15-18 km/h sled tests and 1.4-times greater with a 95th ATD than with a 50th ATD (35.4 v 25.3 degree) in the 42 km/h sled tests.</div><div class="htmlview paragraph">The effect of initial posture was assessed with an obese Class I 50th ATD initially placed in-position versus leaning inboard. Being out-of-position led to increased occupant loading due to inertial loads from the unsupported portion of the ATD. The thoracic-spine extension moment was 1.3-times greater (−155 Nm v −123 Nm) when the ATD was out-of-position than in-position.</div><div class="htmlview paragraph">All biomechanical responses were below the relevant injury assessment reference values (IARV) for head, neck and chest. The highest responses relative to IARVs were for lower neck extension in the 17 km/h out-of-position test, which was recorded up to 44.7% of the IARV. The lower neck extension moment increased with occupant weight in the Expedition seat. It was similar with the F-250 and Mustang seat. Additionally, lower neck extension was 1.2-times greater when leaning inboard than when positioned in a nominal driving position. The highest normalized responses were chest acceleration in the 42 km/h tests, at 30.3% with the 50th and 28.6% with the 95th ATD.</div><div class="htmlview paragraph">The results highlight an increase in seatback rotation with occupant weight. Seatback rotation was lower in modern than in older seats. Seat strength, occupant weight, seating position and crash severity influence occupant kinematics and loading in rear impacts.</div></div>
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,000 | 0,001 |
| Études des sciences et des technologies | 0,000 | 0,001 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,001 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».