CAJ | 학술논문

为研究压缩载荷下关节软骨溶质的扩散过程及其规律，采用有限元方法，将三相本构方程转化为两相方程，利用传热学模型对压缩载荷作用下的溶质扩散进行计算，分析了动态压缩幅值及频率对溶质扩散的影响，得到了软骨内溶质浓度的分布图及随时间、位置变化的曲线。结果表明：压缩幅值相同时，静态压缩比动态压缩时软骨内部溶质更容易扩散；动态压缩幅值增加时，对溶质扩散有抑制作用；频率增加，有利于软骨各层溶质扩散。
위연구압축재하하관절연골용질적확산과정급기규률，채용유한원방법，장삼상본구방정전화위량상방정，이용전열학모형대압축재하작용하적용질확산진행계산，분석료동태압축폭치급빈솔대용질확산적영향，득도료연골내용질농도적분포도급수시간、위치변화적곡선。결과표명：압축폭치상동시，정태압축비동태압축시연골내부용질경용역확산；동태압축폭치증가시，대용질확산유억제작용；빈솔증가，유리우연골각층용질확산。
In order to study the process and law of solute diffusion in articular cartilage under compression loading, triphasic constitutive relation was converted into a biphasic equation and the finite element method of heat transfer was applied to simulate the solute diffusion under compression loading.The effects of dynamic compression amplitude and frequency on solute diffusion were analyzed.Solute concentration distribution and curves with time and locations in car-tilage were obtained.The results show that solute diffusion is easier under static compression than that of dynamic com-pression with the same compression amplitude.Dynamic compression amplitude increase restrains solute diffusion;fre-quency increase is good for solute diffusion at the different layers inside the cartilage.