基于运动力学的头部碰撞问题物质点法模拟研究

Simulation of material point method based on head movement mechanics collision

为了探究人体头部碰撞动态响应问题,基于运动生物力学,采用新近兴起的物质点法,构建三种不同类型的模型,运用铅柱撞击头部的形式为人体头部施加冲击力,探究不同边界条件以及人体头部肌肉对于动态响应的影响。研究发现:头部肌肉可以扩大头部的受力面积,减小单位面积的受力强度,通过肌肉本身的应变有效地缓释冲击力,降低冲击力对于头部的直接伤害;但是,肩部的运动对于头部的影响较小,肩部对于头部主要起固定作用,并无法缓释冲击力。

In order to explore the human head impact dynamic response problem,based on sports biomechanics by newly developed material point method,three different types of model construction,use of lead column impact head form for human head applied impact force,different boundary conditions and human head muscle influence on the dynamic response of the inquiry. Study found that:the muscles of the head,can expand the head by force area,per unit area by the strength and strain through the muscle itself effectively release the impact force,and reduce the impact force for the direct damage to the head; however,motion of the shoulder has a little influence on the head,shoulder for the head of the main fixing and was unable to release the impact force was reduced.