Thoracoabdominal Injuries of Six-Year-Old Child Occupants in Reclined Seating Postures Based on 50％ MPDB Scenario
10.16156/j.1004-7220.2025.05.030
- VernacularTitle:基于50％重叠移动渐进变形壁障工况6岁儿童乘员后倾坐姿对胸腹部损伤影响
- Author:
Haiyan LI
1
;
Sanhao SUN
1
;
Yanxin WANG
1
;
Shihai CUI
1
;
Lijuan HE
1
;
Wenle LÜ
1
Author Information
1. 天津科技大学机械工程学院,天津 300222;现代汽车安全技术国际联合研究中心,天津 300222
- Publication Type:Journal Article
- Keywords:
intelligent seat;
thoracoabdominal injury;
child occupants;
reclined seating posture;
child restraint system
- From:
Journal of Medical Biomechanics
2025;40(5):1309-1317
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the risk of thoracoabdominal injuries in six-year-old child occupants in a reclined seating posture during frontal collisions,and provide a reference for developing child restraint systems(CRS).Methods Three validated biomechanical models of six-year-old child occupants in different seating postures with detailed anatomical structures were used.The acceleration curve from a sport utility vehicle crash test was applied to analyze the effects of seating posture on thoracic motion trajectory,chest acceleration,thoracoabdominal compression,viscous criterion(VC)of the chest and abdomen,internal organ strain,and spinal stress.Results Thoracic motion trajectories varied in the Z-direction under three seating postures.As the upper torso angle increased,thoracoabdominal kinematic injury parameters showed an upward trend.The thoracic and abdominal VC under 120° and 135° posture increased by 67％and 113％,10.7％and 25％compared with that under 105° standard sitting posture.The risk of thoracic internal organ injury was inversely related to the seating angle,while the risk of abdominal internal organ injury was positively related to the seating angle.The primary spinal injury mechanism was compression-flexion.Conclusions CRS protection evaluation should comprehensively consider thoracoabdominal kinematic parameters,internal organ biomechanics,and spinal injury risk.These findings have important implications for CRS development in intelligent driving systems and occupant protection strategy formulation.
