拦阻着舰过程中不同百分位人体颈部损伤风险的差异对比

目的 对比拦阻着舰过程中不同百分位人体颈部损伤风险的差异。方法 利用已建立的人椅背带系统动力学模型和头颈部力学模型，采用文献中典型拦阻着舰过程座椅底部的加速度曲线作为输入条件，开展数值仿真，验证模型的正确性，并得到假人颈部各关节的轴向力、剪切力和弯矩等力学参数。结果 第95百分位假人的剪切损伤Nkm指数高于第5百分位假人。假人上、下部颈椎的Nij指数小于0.2，Nkm指数约为0.65。结论 在拦阻着舰过程中，人体颈部更容易产生由于关节剪切力导致的损伤。研究结果可为评估不同百分位人体在典型拦阻着舰过程中的颈部损伤风险提供数据支持。
Objective To compare the differences of neck injury risks for different mummies during arrested landing on naval vessels. Methods Based on the established dynamic model of dummy-belt-seat systems and mechanical model of head-neck, with the acceleration curve at seat base during typical arrested landing reported in the literature as the input, numerical simulation was conducted to test the validity of the model, and the axial force, shear force， bending moment of typical joints in dummy neck during arrested landing were obtained. Results The injury index Nkm of 95 percentile dummy was higher than that of 5 percentile dummy. The injury index Nij of the dummy’s upper and lower cervical spine was smaller than 0.2, meanwhile the Nkm was around 0.65. Conclusions During arrested landing, human neck was much easier to get hurt due to the shear force. The research findings can provide data support for evaluating neck injury risks of pilots with different sizes during typical arrested landing process.