Lenke3型特发性侧凸脊柱的动态特性  

Dynamic Characteristics of Lenke3 Type Idiopathic Scoliosis

作　　者：李现政 富荣昌[1] 吴辉 孙艳丽 LI Xianzheng;FU Rongchang;WU Hui;SUN Yanli(School of Mechanical Engineering,Xinjiang University,Urumqi 8300,China)

机构地区：[1]新疆大学机械工程学院,乌鲁木齐830000

出　　处：《医用生物力学》2022年第4期638-643,共6页Journal of Medical Biomechanics

基　　金：国家自然科学基金项目(31460245,81760411)。

摘　　要：目的探讨Lenke3型脊柱侧凸有限元模型的动力学响应。方法利用Lenke3型脊柱侧凸患者CT扫描图像建立有限元模型,对模型进行有效性验证。并对模型进行模态分析、谐响应分析和瞬态动力学分析。结果本模型第1阶固有频率仅为1.2 Hz;在第1阶固有频率时,有限元模型的振幅最大。在同一共振频率时,胸弯曲椎体比腰弯曲椎体振幅大;从T6到L2椎体,各方向的振幅依次减弱。结论人体脊柱畸形程度可能影响脊柱对振动的感知。脊柱畸形程度越高,对振动的敏感程度就越高。第1固有频率对Lenke3型脊柱侧凸患者危害最大;在循环载荷下,胸弯曲椎体比腰弯曲椎体更易产生较大变形;越靠近T1椎体,振动幅度就越大。Objective To investigate dynamic response of the finite element model of Lenke3 type scoliosis.Methods The finite element model was established based on CT scanning images from a patient with Lenke3 type scoliosis,and validation of the model was also conducted.Modal analysis,harmonic response analysis and transient dynamic analysis were carried out on the model.Results The first order natural frequency of this model was only 1.2 Hz.The amplitude of the finite element model was the largest at the first natural frequency.At the same resonance frequency,the amplitude of the thoracic curved vertebra was larger than that of the lumbar curved vertebra.The amplitude from T6 vertebra to L2 vertebra decreased successively.Conclusions The degree of spinal deformity may affect the perception of spine vibration,and the higher the degree of spinal deformity,the higher the sensitivity to vibration.The first natural frequency is most harmful to Lenke3 type scoliosis patients.Under cyclic loading,the thoracic curved vertebra is more prone to deformation than the lumbar curved vertebra.The closer to T1 segment,the greater the amplitude of the vibration is.

关 键 词：脊柱侧凸 振动 频率 模态分析 谐响应 瞬态动力学 

分 类 号：R318.01[医药卫生—生物医学工程]