＋Gx着陆冲击人体胸部动力学响应的模型及实验研究  

Study on Dynamic Response of Thorax under+Gx Landing Impact by Model and Experiment

作　　者：罗进[1] 王玉兰[1] 韩延芳 姜俊成[1] 

机构地区：[1]航天医学工程研究所

出　　处：《航天医学与医学工程》1996年第1期17-23,共7页Space Medicine & Medical Engineering

摘　　要：着陆冲击是载人飞船返回着陆必然要遇到的动力学因素，而胸部疼痛是人体对＋Ｇｘ着陆冲击的主要反应之一。为了研究胸部在＋Ｇｘ着陆冲击下的动态响应情况，做了３６人次的＋Ｇｘ冲击实验，实验中同时测量了冲击加速度和人体胸部的响应加速度。根据实验测量结果建立了人体胸部的动力学响应模型，模型计算的响应结果与实验测量的结果符合良好。用该模型计算了高６值＋Ｇｘ冲击下胸部的动力学响应，并根据计算结果推导出３５Ｇｘ作为＋Ｇｘ冲击胸部损伤的响应加速度限值，这个推导出的限值可以为胸部冲击损伤耐受限值的研究提供参考，本研究表明胸部的冲击响应具有非线性的特点，另外，为了减小胸部响应加速度的超调量，应避免使冲击加速度脉宽的倒数接近人体胸部的固有频率。Landing impact is the dynamic factor that manned;paceship will inevitably meet when it returns to the earth.Thoracic pain is the main reaction of human they to+Gx land-ing impact.In order to study the dynamic response of thorax under + Gx impact,36 + Gx impact tests were conducted,the impact acceleration and the thoracic response acceleration were measured simultaneously in the experiment.A dynamic response medel for thorax under+Gx impact was developed,and the parameters of this model was calculated by using the da-ta measured in the experiment.The thoracic response acceleration calculated by the model fit-ted well with that measured in the experiment.Then the medel was used to calculate the dy-namic response of thorax under high G + Gx impact.35 Gx is deduced from the calculated results as the response acceleration limit of thoracic impact injury.This deduced limit can be used as reference in the study on tolerance limit of thoracic injury under + Gx impact.This study shows that thorax under + Gx landing impact has nonlinear response characteristics,and the reciprocal of impact acceleration' s duration should not be close to the inherent fre-quency of thorax in order to decrease the overshcot of thoracic response acceleration.

关 键 词：着陆冲击 正加速度 胸部损伤 冲击损伤 

分 类 号：R852.21[医药卫生—航空、航天与航海医学]