C2～7颈椎振动特性的有限元分析

被引：9

作者：

杨常锐

刘海波

宫赫

机构：

[1] 北京航空航天大学生物与医学工程学院生物力学和力生物学教育部重点实验室

来源：

医用生物力学 | 2018年 / 33卷 / 04期

关键词：

颈椎; 摩擦系数; 固有频率; 振型;

D O I：

10.16156/j.1004-7220.2018.04.002

中图分类号：

R318.0 [一般性问题];

学科分类号：

100103 [病原生物学];

摘要：

目的研究正常C2～7颈椎有限元模型的振动特性和颈椎小关节不同程度受损及切除的振动特性变化。方法基于颈椎CT扫描影像,建立正常C2～7颈椎有限元模型并验证有效性,提取前10阶固有频率和振型。颈椎小关节分别为无约束、有约束且摩擦系数分别为0.01、0.1和0.2,模拟颈椎小关节切除以及小关节轻度、中度、重度受损,研究颈椎受损程度不同对固有频率的影响。结果正常C2～7颈椎模型最低固有频率出现在后伸、侧弯振型,约为12Hz,大位移主要出现在寰椎齿凸。小关节有约束模型的固有频率高于无约束模型,小关节摩擦系数不同对颈椎固有频率无影响。结论研究颈椎的固有频率、振型和振幅等参数,是进一步研究颈椎动态特性的基础,对颈椎护理和治疗有重要意义。在生活和颈椎治疗中,应尽量避开12Hz环境,防止共振对颈椎造成大的损伤。

引用

页码：300 / 305

页数：6

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