Abstract

The present study proposes a 15-degrees of freedom multibody model of semi-supine humans to estimate the injury risk to a space capsule occupant during landing. The model consists of five body segments representing head-neck, thorax-arms, abdomen, thigh-pelvis, and leg. The semi-supine human model is calibrated using transmissibility responses of each body segment obtained from parallel vibration testing on the human subjects. The occupants' dynamic response to impact acceleration incurred during landing is simulated through the developed model. The model estimated the highest acceleration at the thorax and head, respectively, in the chest and spine directions. The impact acceleration of 20g is observed to violate the low injury risk criterion at the seat angle of 30°. The proposed human body model can be employed to design and test the effectiveness of attenuation and restraint systems of a space capsule.

摘要

本研究提出了一个 15 自由度的半仰卧多体模型来估计太空舱乘客在着陆过程中的受伤风险。该模型由五个身体部分组成，分别代表头颈、胸部-手臂、腹部、大腿-骨盆和腿部。半仰卧人体模型是使用从人体平行振动测试中获得的每个身体部分的传递率响应来校准的。通过开发的模型模拟了乘员对着陆过程中产生的冲击加速度的动态响应。该模型分别估计了胸部和头部在胸部和脊柱方向上的最高加速度。观察到 20g 的冲击加速度在 30° 的座椅角度违反了低伤害风险标准。