汽车振动下突出腰椎间盘力学响应的变化规律  

Changing Law of Mechanical Responses of Herniated Lumbar Intervertebral Disc under Automobile Vibration

作　　者：贾通举 刘军[1,2] 李晓骏 戴博 魏柯 刘清[1,2,4,5,6] 张春秋[1,2] JIA Tongju;LIU Jun;LI Xiaojun;DAI Bo;WEI Ke;LIU Qing;ZHANG Chunqiu(Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control,Tianjin University of Technology,Tianjin 300384,China;National Demonstration Center for Experimental Mechanical and Electrical Engineering Education,Tianjin University of Technology,Tianjin 300384,China;School of Management,Tianjin University of Technology,Tianjin 300384,China;Department of Mechanics,Tianjin University,Tianjin 300354,China;Tianjin Key Laboratory of Nonlinear Dynamics and Control,Tianjin 300354,China;National Key Laboratory of Vehicle Power System,Tianjin 300350,China)

机构地区：[1]天津理工大学天津市先进机电系统设计与智能控制重点实验室,天津300384 [2]天津理工大学机电工程国家级实验教学示范中心,天津300384 [3]天津理工大学管理学院,天津300384 [4]天津大学力学系,天津300354 [5]天津市非线性动力学与控制重点实验室,天津300354 [6]车用动力系统全国重点实验室,天津300350

出　　处：《医用生物力学》2024年第6期1058-1065,共8页Journal of Medical Biomechanics

基　　金：国家自然科学基金项目(11802207,U23A6009)。

摘　　要：目的研究汽车振动下突出腰椎间盘力学响应的变化规律。方法使用羊腰椎间盘制作突出和健康试样,分别以前屈和垂直方式进行压缩加载,模拟不同坐姿下汽车驾驶员的腰椎受力,在此基础上进行动态蠕变试验。使用标准线性固体模型描述动态蠕变时腰椎间盘的黏弹性力学行为,计算动态蠕变应变、应变率、弹性模量,分析本构方程的物理意义。结果腰椎间盘突出试样的动态蠕变应变显著大于健康试样,而振幅基本不变;振动加速度对于动态蠕变应变基本没有影响,而对于振幅影响显著;前屈方式对于动态蠕变应变略有影响,而对于振幅影响显著。本构方程计算结果与实验测试结果一致。结论研究结果对预防汽车驾驶员腰痛疾病具有重要的理论指导意义。Objective To investigate the changing law of mechanical responses of herniated lumbar intervertebral disc under automobile vibration.Methods Herniated and healthy intervertebral disc specimens were made using the sheep lumbar spines.The specimens were compressed in flexion/vertical posture to simulate the stress state of the driver’s lumbar spine in different sitting positions,and then the creep experiments were carried out on this basis.The viscoelastic mechanical behaviour of lumbar intervertebral discs during dynamic creep was described using a standard linear solid model,the dynamic creep strain,strain rate,elastic modulus were calculated,and the physical significance of the constitutive equations was analyzed.Results The dynamic creep strain of the herniated lumbar disc specimen was significantly larger than that of the healthy specimen,while the amplitude was basically unchanged;the vibration acceleration had basically no effects on the dynamic creep strain,while it had a significant effect on the amplitude;the forward flexion mode had a slight effect on the dynamic creep strain,while it had a significant effect on the amplitude.The results of the present constitutive equation calculations were in agreement with the results of the experimental tests.Conclusions This study provides important theoretical guidance for the prevention of low back pain diseases in car drivers.

关 键 词：腰椎间盘突出 振动 本构模型 黏弹性 动态蠕变 

分 类 号：R318.01[医药卫生—生物医学工程]