摘要
目的:采用三维有限元重建技术,建立出胸锁乳突肌的三维有限元模型。研究和分析颈部体位姿势对本模型各组成部分应力变化和分布特点的影响。方法:取材来自中国数字人I号头颈部断面切片图片,层距0.2mm,图片序号7800-8400,包含数字人胸锁乳突肌全长。对图片序号每间隔10张抽取1张,层厚2mm(0.2mm×10)。图片保存为BMP灰度图。采用Ansys8.0软件,分别以双侧轴向向上载荷100N,作用于乳突部,模拟头后仰时拉伸力;给一侧乳突部水平向前拉力100N,另一侧乳突部水平向后拉力100N,模拟头旋转时作用力。结果:根据中国数字人男I号头颈部断面切片图片和利用Ansys8.0系统建立出包含了双侧胸锁乳突肌的实体模型。头后仰时的拉伸应力分布均匀,作用点集中在双侧胸锁乳突肌的乳突部。头旋转时应力分布出现高应力区,集中于对侧胸锁乳突肌肌腹的偏下部及乳突部。结论:基于中国数字人男I号头颈部断面切片图片建立的胸锁乳突肌三维有限元模型的效果直观、准确、仿真,可满足研究的要求,今后需进一步研究。
Objective：To set a three-dimensional finite element model of sternocleidomastoid muscle with Ansys8.0 soft system, in order to study the effect of postures of head and neck on stress changes and the distribution characteristics of the muscle. Method： The digital pictures of cross section of neck with a serial number from 7800 to 8400 and interval 0.2 mm were taken from the first of Digital Virtual Chinese Human Ⅰ, which including total length of sternocleidomastoid muscle. Getting 1 piece of picture every interval 10pieces from the serial number to build model of the muscle according the acquired of 3D and the height of slide was 2mm（0.2mm×10）. The manner of picture was keep for BMP.A pulling force of 100N was loaded axially and upward on one pair of sternoeleidomastoid muscle at mastoid processes to simulate head extension. A force of loon was loaded on mastoid level forward at one side and at the mean time, a force of 100N was loaded backward at another side to simulate head rotation. Result： The 3D finite element models were established with the digital pictures and Ansys 8.0, which including one side and both sides of sternocleidomastoid muscle. During simulating head extension, the stress loaded on the muscle was fair well-distributed and acting point concentrated on mastoid process areas of sternoeleidomastoid muscles of both sides. During simulating head rotation, the stress distributed at high stress area and acting point concentrated on mastoid process area and middle-inferior belly of sternoeleidomastoid muscle of contrast side. Conclusion： This three-dimensional finite element model was accurate, simulated, could be directly perceived through one＇s view, and could meet the demanol of study. The further study is needed.
出处
《中国康复医学杂志》
CAS
CSCD
北大核心
2009年第5期423-425,I0002,共4页
Chinese Journal of Rehabilitation Medicine
关键词
胸锁乳突肌
三维有限元
肌筋膜
stemocleidomastoid muscle
three-dimensional finite element
muscular fasciae
