Umale Sagar, Khandelwal Prashant, Humm John, Pintar Frank, Yoganandan Narayan
Aperture LLC, Long Beach, CA.
Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI.
Traffic Inj Prev. 2022;23(sup1):S211-S213. doi: 10.1080/15389588.2022.2125237. Epub 2022 Oct 12.
The objective of the current study was to compare the GHBMC female model responses with in-house sled test data for three small female post mortem human surrogates (PMHS) at 32 km/h and a seatback recline angle of 45 degrees. The kinematics and the seatbelt forces were used to compare the female PMHS and model responses. The study aimed to identify updates that may be needed to the model. In-house experimental sled test kinematic and seatbelt response data for the small females were obtained. The 5 female GHBMC was simulated with the same boundary conditions as in the experiments. In addition, using the PMHS computed tomography (CT) and test environment scans, the female model geometry was updated to a subject-specific model for one of the specimens, and the models were simulated to obtain 5 female and subject-specific model responses. The kinematic response and the seatbelt forces for the two models were compared with the average of the three experimental data. The head, T8 and L4 excursions, head and pelvis accelerations and seatbelt forces for the two female models were compared with the experimental data. The model responses were in agreement with the PMHS; however, the subject-specific model showed a closer agreement with the kinematic response. The subject-specific model did not submarine as in the experiments, whereas the 5 female model submarined. However, the subject-specific model showed 20% higher seatbelt forces than the PMHS. This study showed that anthropometric differences may significantly alter occupant kinematics in reclined posture and need to be incorporated to investigate kinematics and injury mechanisms. The next step of the study involves incorporating age-specific material changes and investigating the subject-specific injury mechanisms. The results will be useful to develop countermeasures for autonomous vehicles.
本研究的目的是将GHBMC女性模型的响应与内部雪橇试验数据进行比较，该数据来自三名体重较轻的女性尸体代用品（PMHS），试验速度为32公里/小时，座椅靠背倾斜角度为45度。利用运动学和安全带力来比较女性PMHS和模型的响应。该研究旨在确定模型可能需要的更新。获取了内部实验雪橇试验中体重较轻女性的运动学和安全带响应数据。在与实验相同的边界条件下对5女性GHBMC模型进行了模拟。此外，利用PMHS计算机断层扫描（CT）和试验环境扫描，将其中一个标本的女性模型几何形状更新为特定于个体的模型，并对模型进行模拟以获得5女性模型和特定于个体的模型响应。将两个模型的运动学响应和安全带力与三个实验数据的平均值进行比较。将两个女性模型的头部、T8和L4位移、头部和骨盆加速度以及安全带力与实验数据进行比较。模型响应与PMHS一致；然而，特定于个体的模型与运动学响应的一致性更高。特定于个体的模型没有像实验中那样发生下潜，而5女性模型发生了下潜。然而，特定于个体的模型显示安全带力比PMHS高20%。本研究表明，人体测量学差异可能会显著改变倾斜姿势下的乘员运动学，需要纳入研究运动学和损伤机制。该研究的下一步包括纳入特定年龄的材料变化并研究特定于个体的损伤机制。研究结果将有助于开发自动驾驶车辆的对策。
