加速度造成不对称周边视力丧失的仿真研究

Compound high-overload acceleration will lead to the loss of asymmetric peripheral vision in the human body and will become a great hidden danger to flight safety. Based on this, this paper proposes to use numerical simulation methods to explore the impact of acceleration on binocular vision, in order to explore the mechanical mechanism of the loss of asymmetric peripheral vision in the human body caused by compound acceleration. Firstly, this paper conducts three-dimensional reconstruction on the adult skull sequence images of computed tomography (CT) to obtain a skull simulation model containing binocular eye sockets. Then, the previously established single eyeball model is mirrored to obtain a binocular model, which is matched into the skull model and filled with fat for improvement. The acceleration loads in the head-to-foot direction (Gz), the right-to-left direction (Gy), the chest-to-back direction (Gx), and the compound acceleration loads in three directions are respectively applied to this model, and the explicit dynamic algorithm is used to obtain the dynamic mechanical response of the retina. The simulation research results show that under the action of compound acceleration, the strain difference between the two eyes is 25.7%, and its distribution characteristics have obvious differences. By establishing a binocular finite element model, this paper provides a new method for exploring the mechanism research of the loss of asymmetric peripheral vision caused by compound acceleration.

复合高过载加速度将导致人体不对称的周边视力丧失，会成为飞行安全的极大隐患。基于此，本文提出用数值仿真的手段探究加速度对双眼视力的影响，以期探索复合加速度造成人体不对称周边视力丧失的力学机制。本文首先将计算机断层扫描（CT）的成年人头骨序列图像进行三维重建，得到含有双眼眼眶的头骨仿真模型。再将之前建立的单眼球模型进行镜像，得到双眼模型，匹配至头骨模型中，并填充脂肪加以完善。对该模型分别加载头-足方向的加速度载荷（Gz）、右-左方向的加速度载荷（Gy）、胸-背方向的加速度载荷（Gx）以及三个方向的复合加速度载荷，利用显式动力学算法，得到视网膜的动态力学响应。仿真研究结果表明，复合加速度作用下双眼应变相差 25.7%，其分布特征具有明显差异。本文通过建立双眼有限元模型，为探索复合加速度造成不对称的周边视力丧失的机制性研究提供一种新的手段。