人工髋关节稳定性影响因素的敏度分析  

Sensitivity Analysis about Influence Factors on Stability of Hip Prosthesis

作　　者：胡迎春[1] 赵舒婷[1] 侯军燕[2] 王汝贵[3] 

机构地区：[1]广西师范大学职业技术师范学院,桂林541004 [2]柳州铁道职业技术学院,柳州545006 [3]广西大学机械工程学院,南宁530004

出　　处：《机械工程学报》2015年第9期45-50,共6页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51265003);广西自然科学留学回国基金(2011GXNSFC018005);广西高校优秀人才资助计划(桂教人[2010]65号)资助项目

摘　　要：为准确评估人体自身因素对人工髋关节稳定性的影响程度,以人工髋关节稳定性为控制目标,考虑人体骨头密度、人体质量、行走步长、身高与抬脚高度等5个因素,运用人体生物力学与弹性力学知识,建立人工髋关节微动位移数学模型。基于敏感性分析原理,在Matlab中绘制控制目标对各影响因素的敏感度曲线图,并对结果进行数据拟合得到各影响因素的敏感度函数表达式,在5个因素均取人体基准值的情况下,通过函数表达式可分别求出控制目标对各因素的敏感度值以及各影响因素的影响百分比。结果表明,在上述5个因素中,人体骨头密度对人工髋关节稳定性的影响程度最大,其后影响程度依次为行走步长、人体质量、抬脚高度与身高。研究人体骨头密度、人体质量、行走步长、身高和抬脚高度对人工髋关节稳定性的影响程度,对临床安装人工髋关节有很好的指导意义和借鉴作用。In order to evaluate the influence of human body factors on stability of hip prosthesis accurately, some factors such as bone density of human body, body mass, walking step size, the height of human and the size of lifted foot are considered. Mathematical model of micro displacement of hip prosthesis is set up, applying the knowledge of human biomechanics and elasticity mechanics, with which the objective of stability of hip prosthesis is concerned. Sensitivity curves of influence factors are drawn in Matlab based on principle of sensitivity analysis. Meanwhile, each sensitivity function expression of factors is obtalned through fitting the data in curves. The sensitiveness of objective and influential percentage of each factor is obtalned with basic value of five factors above. The results show that the greatest influence on stability of hip prosthesis is bone density of human body, followed by walking step size, body mass, the height of human and the size of lifted foot. It is good to be given instruction and reference for clinical use of hip prosthesis to research on the influence of bone density of human body, body mass, walking step size, the height of human and the size of lifted foot.

关 键 词：人工髋关节稳定性 人体因素 敏度分析 敏感度曲线 影响因素百分比 

分 类 号：TB18[一般工业技术] R318[医药卫生—生物医学工程]