An active safety headrest structure controlled by crash acceleration signal is proposed and a finite element ( FE) model for the driver seat of a vehicle is established and verified. And based on FE software LS-DY-NA and multi-rigid-body software MADYMO, a coupled calculation model for the seat and BioRIDII dummy is also set up to conduct a simulation on the dynamics response of occupant in a rear-end collision. The results show that the active safety head restraint can reduce NIC value by 33. 8% compared with the original structure.%提出了一种基于碰撞加速度信号控制的主动式安全头枕结构，建立并验证了某车型的驾驶员座椅有限元模型，利用有限元软件LS-DYNA和多刚体软件MADYMO建立了该座椅和BioRIDII假人的耦合计算模型，利用该模型进行了乘员在追尾碰撞中的动力学响应仿真。结果表明，所设计的主动式安全头枕在追尾碰撞中可使乘员颈部损伤指数NIC值比原结构降低33.8%。
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