基于运动力学的头部碰撞问题物质点法模拟研究

摘要

In order to explore the human head impact dynamic response problem,based on sports biomechan-ics by newly developed material point method,three different types of model construction,use of lead col-umn 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 ex-pand the head by force area,per unit area by the strength and strain through the muscle itself effectively re-lease 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.%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。