路面随机振动下人体椎间盘关节力学特性分析  

Analysis on Mechanical Properties of Human Intervertebral Disc Under Random Vibration

作　　者：郭立新[1] 李睿[1,2] 

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819 [2]大连民族学院机电信息工程学院,辽宁大连116600

出　　处：《东北大学学报（自然科学版）》2015年第3期410-414,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51275082);中央高校基本科研业务费专项资金资助项目(N130403009)

摘　　要：建立了L4-L5椎体关节的三维有限元模型,分别表示5种人体尺寸和不同的3种坐姿.研究当汽车在路面上行驶时,人体高度、体重和坐姿与脊椎关节压缩应力和剪切应力的关系.结果表明:弯曲坐姿时,脊椎承受的压缩应力和剪切应力最大.人体的高度和体重对于脊椎关节的静态剪切应力和压缩应力都会产生不同程度的影响.脊椎应力与座椅处振动的传递函数和驾乘人员的坐姿有着重要的关系,无论何种体型的人体,驾驶坐姿都比弯曲坐姿所承受的应力小,证明驾驶坐姿更舒适.A kind of 3D finite element model of L4-L5 segment intervertebral discs was developed. The relationship of compressive stress and shear stress with various body weight,body height and posture in driving cars was studied. The transfer function between the spine stress and the random vibration of the seat was researched. The results showthat the maximum value of compressive stress and shear stress of the lumbar occurs during bending posture. The body height and weight influence the static shear stress and compression stress of the lumbar. The sitting posture of the driver influences the transfer function between the stress of spine and vibration acceleration. The stress of driving posture is smaller than bending posture regardless of the size of the human body,which indicates driving posture more comfortable.

关 键 词：人体椎间盘 坐姿 随机振动 压缩应力 剪切应力 传递函数 

分 类 号：TB17[生物学—生物工程]